| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 700280000 | Vibration or acoustic noise control | 80 |
| 20080262658 | Vibration Compensation Based on Identification of Vibration Frequency - A shock detection circuit housed in an electronic device includes an output shock signal that is indicative of vibration amplitude. To compensate for vibrations that are experienced by the electronic device, the output shock signal is analyzed. The analysis of the output shock signal allows a vibration frequency of the output shock signal to be identified and used in vibration compensation. | 10-23-2008 |
| 20080294292 | METHOD AND DEVICE FOR FREQUENCY-RESPONSE CORRECTION IN VIBRATION ISOLATION SYSTEMS - To achieve improved frequency-response correction of a vibration-signal transmitter in a vibration isolation system, the invention proposes a method in which an analog sensor signal representing vibrations is generated by means of a vibration-signal transmitter, this sensor signal is amplified for correcting frequency-dependent sensitivity of the vibration-signal transmitter, an actuator control signal is generated by processing the amplified sensor signal, and an actuator is controlled with the actuator control signal for counteracting the vibrations, wherein the amplification of the sensor signal includes first amplification by means of an analog amplification stage and second amplification by means of a digital amplification stage. | 11-27-2008 |
| 20080300726 | Control system for active vibration isolation of a supported payload - The invention relates to a control system for active vibration isolation of a supported payload with a control device that comprises a processing unit ( | 12-04-2008 |
| 20090093911 | Vibration Protection In A Variable Speed Compressor - Vibration protection in a compressor system with a variable speed compressor may include operating a variable speed compressor at a plurality of frequencies, measuring a plurality of vibration values associated with the plurality of frequencies, determining a frequency characteristic of the compressor system based on the plurality of vibration values, and identifying prohibited compressor frequencies based on the frequency characteristic. | 04-09-2009 |
| 20090105885 | CHARACTERIZING VIBRATIONAL HEALTH IN COMPUTER SYSTEMS WITH VARIABLE COMPONENT CONFIGURATIONS - One embodiment of the present invention provides a system that efficiently conducts vibrational characterizations for a computer system having variable component configurations. During operation, the system receives a given component configuration associated with the computer system. Next, the system looks up the given component configuration in a resonant spectra library, which contains structural resonant frequencies for a number of possible component configurations for the computer system. If the given component configuration is found in the resonant spectra library, the system retrieves a set of structural resonant frequencies associated with the given component configuration. The system subsequently controls one or more vibration sources within the computer system to avoid the set of structural resonant frequencies. | 04-23-2009 |
| 20090138127 | CONTROL APPARATUS AND CONTROL METHOD FOR MULTI-ROOM AIR CONDITIONER - A heat source side controller of an air conditioner has an operating mode allocator and an operating mode setter. The air conditioner has a heat source unit and a plurality of room units. The heat source unit can be switched among a plurality of operating modes having different noise-reduction levels. The operating mode allocator allocates one operating mode to each of the operating room units. The operating mode setter sets the heat source unit to one operating mode from among the plurality of operating modes on the basis of the operating modes allocated by the operating mode allocator to each of the operating room units. In cases in which a specific operating mode is allocated to all of the operating room units, the operating mode setter sets the heat source unit to the specific operating mode. | 05-28-2009 |
| 20090143919 | Suppression of Vibrations - Disclosed are a method and a device for suppressing vibrations ( | 06-04-2009 |
| 20090149999 | Gearbox Noise Reduction By Electrical Drive Control - A system for damping audible noise from a drive train. One embodiment is a system with an audible noise signal from a drive train wherein a damping circuit produces a damping torque that is a phase shifted and amplified version of the noise signal that is applied to the air-gap torque of a generator or motor coupled to the drive train and effectively reduces the audible noise. | 06-11-2009 |
| 20090240375 | VIBRATION CONTROL SYSTEM - A vibration control system and a method for controlling vibration in a material surface are disclosed, wherein the vibration control system provides a desired motion of the material surface while militating against any undesirable motion of the surface. The vibration control system includes a sensor disposed adjacent a material surface having a first set of dynamic vibration properties, a displacement generating device disposed adjacent the material surface adapted to generate a localized motion in the material surface, and a controller adapted to receive an input signal from the sensor and transmit a control signal to the displacement generating device thereby controlling the localized motion in the material surface. | 09-24-2009 |
| 20090248209 | Apparatus for reduction of vibrations of a structure - An apparatus ( | 10-01-2009 |
| 20090276098 | Method for controlling an MR-fluid hydraulic mount connected to a vehicle engine - A method of the invention is for controlling an MR-fluid hydraulic mount connected to a vehicle engine. The mount includes an internal MR-fluid cavity. The mount includes a partition plate assembly partitioning the cavity into first and second MR-fluid chambers. The partition plate assembly has an orifice extending from the first MR-fluid chamber to the second MR-fluid chamber. The mount includes an electric coil positioned to magnetically influence the orifice. The method includes, when the vehicle engine is at idle, determining a reference pressure as a fluid pressure within the second MR-fluid chamber. The method includes, when the vehicle engine is above idle, determining a command electric current to be applied to the electric coil using at least a difference between the reference pressure and a current fluid pressure within the second MR-fluid chamber. The method includes applying the command electric output current to the electric coil. | 11-05-2009 |
| 20090281670 | Method and device for robust rejection of periodic disturbances in an axis-position control loop - A method and a device for robust rejection of the periodic disturbances in a motor-position control structure of the RST type, wherein the assembly including the motor, the position sensor, the element for computing the functions 1/So(z | 11-12-2009 |
| 20090292396 | METHODS AND APPARATUS FOR ISOLATION SYSTEM - Methods and apparatus for isolation system according to various aspects of the present invention comprise a plurality of elastic elements disposed in one or more planes between an equipment body and a mounting structure and are not symmetric about the center of gravity of the equipment body. The isolation system is configured to modally decouple vibration along one axis from other axes of vibration and provide an isoelastic mounting system in up to all six degrees of freedom. | 11-26-2009 |
| 20090292397 | METHOD AND APPARATUS FOR DAMPING TOWER OSCILLATION IN A WIND TURBINE - A method of damping tower oscillation in a wind turbine is provided. The method includes the steps of determining a rotor rotational speed of the wind turbine and controlling the rotor rotational speed such that a critical rotor speed is avoided, characterized in that it further comprises the following steps: selecting at least one input parameter value; selecting, according to the input parameter value, an operation mode for controlling the rotor rotational speed, wherein the operation mode is selected from a set of modes comprising a mode of auto tune operation; on the condition of the selected operation mode comprising the mode of auto tune operation, performing the following steps: detecting the tower oscillation frequency; calculating the critical rotor speed based on the detected tower oscillation frequency and controlling the rotor rotational speed to avoid the calculated critical rotor speed. An apparatus and a computer program product are also provided. | 11-26-2009 |
| 20090312875 | METHOD AND AN ARRANGEMENT FOR DAMPENING VIBRATIONS IN A MAST STRUCTURE - A method and an arrangement for dampening vibration in a mast structure of a mast truck where the critical characteristics of the mast structure and/or of the vibration are measured, computed, measured and computed or at least some of the characteristics are fed to the computing system in advance, the lowest natural frequency (ω | 12-17-2009 |
| 20100030384 | Vibration Isolation System With Design For Offloading Payload Forces Acting on Actuator - An active damping system for use in connection with a vibration isolation system is provided. The active damping system having an actuator for placement on the ground, and an intermediate mass supported on the actuator for acting as a stability point to which dynamic forces can be dampened and isolated from the payload. The active damping system also includes a passive damping element and a support spring, both coupled at one end to a payload and at an opposite end to the intermediate mass. At least one offload spring can be situated between the intermediate mass and the ground for partially supporting any weight from the payload acting on the actuator. A sensor can also be affixed to the intermediate mass to generate a feedback signal to the actuator for subsequent acting on the intermediate mass to permit the intermediate mass to act as a stability point. A system and method for isolating dynamic forces using such an active damper is also provided. | 02-04-2010 |
| 20100057260 | SELF-TUNING VIBRATION ABSORBER - A self-tuning vibration absorber including a carrier rod assembly having operatively connected thereto a mounting mechanism for mounting the carrier rod assembly to a primary system and a hollow shafted motorized tuning mechanism for tuning a phase difference between vibration of the primary system and vibration of the carrier rod assembly to 90 degrees, the carrier rod assembly further including a detecting mechanism for detecting the vibration of the primary system and the vibration of the carrier rod assembly, and a controller in electrical connection with the detecting mechanism and the tuning means for controlling the tuning mechanism based on the vibration of the primary system and the vibration of the carrier rod assembly detected. A method of vibration dampening, a method of controlling a self-tuning vibration absorber, and a method of reducing hunting motion in railcars. | 03-04-2010 |
| 20100070094 | OPERATING METHOD FOR A MACHINE WHICH IS DRIVEN USING A DRIVE, WITH STATE IDENTIFICATION BY MEANS OF FREQUENCY ANALYSIS - A machine having a drive that directly or indirectly excites vibrations in the machine over a frequency range when the drive is connected to the power supply. A sensor detects a time-dependent signal that is characteristic of the excited vibrations. The time-dependent signal is transmitted to a control device that analyzes the frequency of the time-dependent signal and relates the frequency analysis to the excitation that produces the excitation and uses this relationship to determine a state of at least one element of the machine. The control device outputs a message to an operator of the machine on the basis of the state that is determined. Preferably, the control device applies an interference variable that has at least one frequency inside the frequency range to the drive so as to excite vibrations. The interference variable may be a sinusoidal interference variable whose frequency passes through the frequency range, or a pseudobinary interference variable whose spectrum covers the frequency range. If the drive is an electrical three-phase drive, asymmetrical energization may be used. | 03-18-2010 |
| 20100082164 | AUTO-CONFIGURING CONDITION MONITORING SYSTEM AND METHOD - In one embodiment, the disclosed method includes receiving a user selection of a machine system type from a plurality of machine system types, where the system types corresponding to specific machine component combination. The method also includes configuring alarms based on the machine system type, configuring calculations of vibration parameters based on the machine system type, wherein the calculations are adjusted for the machine system type, and configuring diagnostic information based on the machine system type. | 04-01-2010 |
| 20100082165 | Torsional Oscillation Damper - A torsional vibration damper ( | 04-01-2010 |
| 20100106335 | DUAL-TUNED VIBRATION DAMPER AND METHOD FOR DAMPING VIBRATIONS IN A POWER TRANSMISSION SYSTEM USING A DUAL-TUNED VIBRATION DAMPER - A vibration damper includes a hub, a first mass, a first resilient coupling, a second mass, and a second resilient coupling. The first mass is disposed concentrically about the hub. The first resilient coupling resiliently couples the first mass to the hub. The first resilient coupling has a first spring constant. The second mass is disposed concentrically about the first mass. The second resilient coupling resiliently couples the second mass directly to the first mass. The second resilient coupling has a second spring constant that is less than the first spring constant. The first mass and the first resilient coupling are configured to attenuate vibration at a first frequency. The second mass and the second resilient coupling are configured to attenuate vibration at a second frequency. The second frequency is lower than the first frequency. | 04-29-2010 |
| 20100106336 | ELECTRIC TOOTHBRUSH AND METHOD FOR CONTROLLING THEREOF - An electric toothbrush is disclosed. The electric toothbrush according to some example embodiments includes a bristle-vibrating unit that vibrates toothbrush bristles to clean a side of teeth in contact with the toothbrush bristles, a bristle direction-sensing unit detecting a direction to which the toothbrush bristles are directed in an oral cavity and a control unit automatically controlling the bristle-vibrating unit in response to the detected direction such that the vibration intensity of the toothbrush bristles when an occlusal side is brushed is weaker than the vibration intensity when a buccal side or a lingual side is brushed. | 04-29-2010 |
| 20100131114 | ACTIVE TUNED VIBRATION ABSORBER - An active tuned vibration absorber ( | 05-27-2010 |
| 20100191380 | UNBALANCE CORRECTION DEVICE OF HIGH SPEED ROTARY APPARATUS - An unbalance correction device of a high speed rotary apparatus which can prevent the lowering of productivity in the production line of a high speed rotary apparatus while reducing variation in the posture of a workpiece supported by a jig and suppressing vibration of a member (clamp member) for securing the workpiece to the jig, and can enhance the precision of unbalance correction. The unbalance correction device ( | 07-29-2010 |
| 20100211225 | Combined motion sensor for use in feedback control systems for vibration isolation - The present invention relates to a method for controlling a vibration isolation system, and an active vibration isolation system for vibration-isolated support of lithographic devices, wafer handling systems, and/or scanning microscopes. For this purpose the following are provided: a number of vibration transducers for supplying sensor signals which are representative of vibrations; a number of actuators for vibration compensation which may be controlled by supplying actuator control signals; a control device which is designed for processing the supplied sensor signals to form the actuator control signals, wherein the vibration transducers have at least one geophone sensor as a first acceleration sensor for detecting vibrations in a first frequency range, and at least one second acceleration sensor, which is different from the first acceleration sensor, for detecting vibrations in a second frequency range which extends the first frequency range. | 08-19-2010 |
| 20100262300 | ACTIVE VIBRATION SUPPRESSION VIA POWER MINIMIZATION - A vibration suppressor system includes a control system operable to control power from a power system to an actuator system in response to a minimal actuation power algorithm. The minimal actuation power algorithm employs a real electric power consumption of the actuator system as a single control objective function to suppress a vibration of the structure. | 10-14-2010 |
| 20100268387 | DEVICE FOR A MOVING OBJECT'S VIBRATION DAMPING - This invention concerns a device for vibration damping of an object ( | 10-21-2010 |
| 20100268388 | Method of Controlling A Surgical System Based on Irrigation Flow - A surgical system that is able to sense the onset of an occlusion or other surgical event as well as the instant an occlusion breaks. To help avoid overheating of the tip, the system determines a temperature of an eye using irrigation flow rate and reduces the power to the handpiece automatically if an overheating situation is predicted. Alternatively or in addition, the system monitors the power drawn by the handpiece, which is indicative of the cutting load on the tip, and automatically adjusts the power or stroke of the tip to compensate for increased loads on the tip. | 10-21-2010 |
| 20100286832 | METHOD FOR OPERATING A MECHANICAL SYSTEM, PARTICULARLY A PROPORTIONING VALVE - A mechanical system has a component, which is movable under friction. An oscillating micromotion (dither) is impressed upon the component, which, if necessary, is added to a non-oscillating base motion of the component. It is provided that the micromotion (without the base motion that is additional, if necessary) is faster within a period of the oscillation in the one direction and is of shorter duration than in the opposite direction (asymmetrical dither). | 11-11-2010 |
| 20110010015 | METHOD FOR THE NOISE-REDUCING CONTROL OF A HEATING, VENTILATING AND/OR AIR CONDITIONING SYSTEM OF A MOTOR VEHICLE - A method is provided for controlling a system (i.e., a heating, ventilating and/or air-conditioning of a motor vehicle. The control unit generates a control signal that regulates the system given a deviation of the actual value from a prescribed desired value by a threshold in order to reduce the deviation, wherein the threshold is varied as a function of a noise level prevailing inside the vehicle. In addition, a computer program product is provided for implementing such a method, as well as a correspondingly equipped air-conditioning system of a vehicle. | 01-13-2011 |
| 20110015790 | CONTROL SYSTEM, OSCILLATION CONTROL DEVICE, AND CONTROL SIGNAL GENERATION METHOD - There is proposed a control system and the like that can realize a CPG (Central Pattern Generator) network having high controllability. A control system (CPG network) includes a plurality of oscillation control devices (CPG) and one target signal generating device (rhythm generator (RG)). Each CPG and the RG are described by the Van der Pol equation, and an amplitude and a period of an output waveform are substantially independently controlled by an external signal. In order to control a phase difference between the CPGs, the period of each CPG is temporarily controlled through connections that are only conjunctions between the each CPG and the RG. | 01-20-2011 |
| 20110040414 | METHODS FOR CONTROLLING A WIND TURBINE CONNECTED TO THE UTILITY GRID, WIND TURBINE AND WIND PARK - Methods for controlling a wind turbine connected to the utility grid by detecting status of the utility grid, and controlling one or more rotor blades and/or emitted power to the grid in returning to the operational wind turbine settings of normal grid mode, as well as wind turbines and wind parks comprising at least two wind turbines. | 02-17-2011 |
| 20110046794 | Multi-Channel Active Control System and Methods for the Reduction of Tonal Noise from an Axial Fan - A method of optimizing placement of a control source relative to a noise source includes establishing a first pool of constructive chromosomes, each constructive chromosome defining a potential spatial position for the control source in an acoustic space and each constructive chromosome including a plurality of constructive genes having a value-based value that represents an ordinate related to the potential spatial position. A second pool of constructive chromosomes is established by manipulating the value-based values of constructive genes from at least a portion of the plurality of constructive chromosomes of the first pool to create a plurality of modified constructive chromosomes, and evaluating a fitness characteristic of at least some of the constructive chromosomes from the first pool and/or at least some of the constructive chromosomes from the second pool. A portion of the constructive chromosomes are eliminated from the first and/or second pools based on the fitness characteristic. | 02-24-2011 |
| 20110046795 | DRIVE CONTROL METHOD, DRIVE CONTROL APPARATUS, STAGE CONTROL METHOD, STAGE CONTROL APPARATUS, EXPOSURE METHOD, EXPOSURE APPARATUS AND MEASURING APPARATUS - A drive control method of controlling an object which can move at least in a first direction and a second direction different from the first direction is provided. Here, a force applied to the object is controlled on the basis of a driving signal for driving a first actuator moving the object in the first direction and a disturbance correcting signal generated from a disturbance signal in the second direction at an output terminal of the object. | 02-24-2011 |
| 20110060469 | METHODS TO INCREASE FORCE AND CHANGE VIBRATORY SEPARATOR MOTION - A vibratory separator including a frame, a basket disposed on the frame, and a motor configured to impart a vibratory motion to the basket. Additionally, the vibratory separator includes an adjustable speed drive operatively coupled to the motor to control a vibratory motion imparted to the basket. Also, a method of processing drilling waste including generating a first vibratory motion on a vibratory separator using at least one motor, and adjusting the first vibratory motion using an adjustable speed drive to generate a second vibratory motion. | 03-10-2011 |
| 20110066292 | VIBRATION CONTROL DEVICE AND VEHICLE - [Object] To predetermine a target vibration level and keep vibration generated at a position at which vibration is to be controlled equal to or smaller than a target vibration level. | 03-17-2011 |
| 20110125330 | Interactive Patient System - The present invention provides an interactive patient system comprising: apparatus; sensing means associated with the apparatus, the sensing means adapted to send, receive or identify a location signal; presence identification means associated with a region of a patient, the presence identification means adapted to send, receive or identify a location signal; and altering means adapted to alter a property of the apparatus in proximity to the presence identification means upon identification of an activity signal, thereby effecting an activity in the vicinity of the region of the patient, wherein the activity signal is associated with transmission or identification of at least one location signal as between the sensing means and the presence identification means. Also provided is a method for providing a directed response to a region of a patient. | 05-26-2011 |
| 20110125331 | OPERATION MONITORING SYSTEM FOR PROCESSING APPARATUS - In a processing apparatus having: moveable parts disposed to form a predetermined processing environment within a processing chamber in which a predetermined processing is performed on an object to be processed; and a control means for controlling the operation of each of the moveable parts, abnormality inclusive of deterioration with time of the moveable parts constituting the processing apparatus is made to be easily judged. There is provided a vibration detection means for detecting the waveforms of vibrations that occur accompanied by the operation of the moveable parts. When control is made from the control means in order to operate any one of the moveable parts, there are obtained event data corresponding to the control and the waveforms of vibrations of all the moveable parts that are operating simultaneously at the time in question. Each time the control corresponding to the event data is selected, or when a waveform of vibration corresponding to another event data of the same kind as that of the above-mentioned event data has been obtained, the change in the waveform is monitored. When the waveform has changed beyond a predetermined range, the processing apparatus is judged to be abnormal. | 05-26-2011 |
| 20110153092 | METHOD OF AND APPARATUS FOR COMPENSATION OF OSCILLATION EFFECTS IN THE EVENT OF MAINS ASYMMETRY IN A DOUBLE-FED ASYNCHRONOUS MACHINE - In a method for the compensation of rotor torque oscillations upon the occurrence of mains asymmetries in relation to a double-fed asynchronous machine ( | 06-23-2011 |
| 20110208361 | MOTION CONTROL SYSTEM WITH DIGITAL PROCESSING LINK - A digital processing link for a vibration control system collects sensor signals at a transfer station and combines the sensor signals into a collective signal that is transmitted under a digital communications protocol to a base station. The sensor signals are separated at the base station and individually processed to produce one or more output control signals to actuators for counteracting the measured vibration. | 08-25-2011 |
| 20110245980 | METHODS AND APPARATUS FOR REDUCING STICK-SLIP - A method and apparatus for estimating the instantaneous rotational speed of a bottom hole assembly at the lower end of a drill string. In one embodiment, a method includes driving the drill string by a drilling mechanism at the upper end of the drill string. A fundamental frequency of stick-slip oscillations suffered by the drill string is estimated. Variations in a drive torque of the drilling mechanism are determined. Known torsional compliance of the drill string is combined with the variations in the drive torque. An output signal representing the instantaneous rotational speed is provided. | 10-06-2011 |
| 20110295431 | TIME DOMAIN VIBRATION REDUCTION AND CONTROL - A vibration control system includes a mechanical system which generates vibration; a sensor configured to measure the vibration and generate a vibration signal thereof, and a processor configured: (a) receive a vibration signal from a sensor in a mechanical system; (b) model the vibration signal using a time-domain function; (c) adjust one of an amplitude coefficient and a phase coefficient of the modeled vibration signal; (d) output a control signal corresponding to the modeled vibration signal to the mechanical system so as to reduce the vibration; and (e) receive another vibration signal from the sensor. Steps (c)-(e) are repeated when the average value of the vibration signal is greater than a predetermined value. A method for vibration control is also disclosed. | 12-01-2011 |
| 20110320046 | Drive method for starting and operating a resonant scanning MEMS device at its resonant frequency - The resonance frequency of a forced torsionally oscillating mirror MEMS device can be controlled in the presence of perturbations by means of a closed loop feedback device and method of using it. The method is implemented through a simple algorithm, implemented in either software or hardware, that maintains the condition of resonance, or another selected frequency, by recursively determining that the center of the driving voltage pulse is positioned at a point on the measured positional waveform of the oscillating system. | 12-29-2011 |
| 20120004777 | System and Method for Reducing Lateral Vibration in Elevator Systems - A system and method reduce lateral movement of a car in an elevator system by detecting vibration of the car as a vibration signal. A damping coefficient for a feedback signal is determined according to the vibration signal and a state of the elevator system. A semi-active actuator is arranged between the car and a roller guide assembly. The semi-active actuator includes a rheological fluid, and flow characteristics of the rheological fluid are actuated according to the feedback signal to reduce the lateral movement of the car. | 01-05-2012 |
| 20120065784 | PROVIDING KINETIC FEEDBACK FOR COMPUTER-HUMAN INTERACTION IN VIRTUAL OR REMOTE OPERATION ENVIRONMENTS - A kinetic feedback system for facilitating computer-human interaction includes a control member configured to be manipulated by a user, a sensor coupled with the control member, where the sensor is configured to measure a force applied to the control member due to a manipulation by the user upon the control member, an actuator configured to displace a portion of the system that is engaged by the user during system operation, and a processor coupled with the sensor and the actuator. The processor is configured with control process logic to receive signals from the sensor including information relating to forces applied to the control member by the user as measured by the sensor, control movement of an object within an environment based upon the measured forces applied to the control member by the user, and control the actuator to displace the portion of the system in response to a determination by the processor of a force being applied to the object by another object within the environment. | 03-15-2012 |
| 20120158191 | ACTIVE VIBRATION ISOLATION AND DAMPING SYSTEM - An active vibration isolation and damping system ( | 06-21-2012 |
| 20120165994 | SYSTEM AND METHOD FOR TUNING THE RESONANCE FREQUENCY OF AN ENERGY ABSORBING DEVICE FOR A STRUCTURE IN RESPONSE TO A DISRUPTIVE FORCE - The invention is a system and method for automatically adjusting the resonance frequency of an energy absorbing device in response to a disruptive force. By configuring an energy absorbing device for automatic response tuning, utilizing a controller coupled to one or more sensors for processing a determination primarily based on sensing data, the natural period of an overall structure may be adjusted (i.e. increased or decreased) so that the acceleration response of the structure is decreased upon being subjected to a disruptive force, for example, high winds, a blast from an explosion, or a seismic force caused by an earthquake. | 06-28-2012 |
| 20120215363 | METHOD AND SYSTEM FOR REDUCING VIBRATION OF MOTION-ENABLED CHAIRS - In a building equipped with a plurality of motion-enabled chairs such as a movie theatre, the vibration of the motion-enabled chairs adds up and may damage the foundation of the building especially at the resonance frequency. The present application describes a system and method for controlling the resulting vibration by introducing an alteration such as a delay or an inversion in the motion signals sent to the motion-enabled chairs. This delay causes the vibration of some motion-enabled chairs to be de-phased from the vibration of the other motion-enabled chairs. Whereby, the intensity (magnitude) of the resulting vibration is reduced. Control of the motion-enabled chairs may be done centrally through a central controller, or locally at selected motion-enabled chairs. | 08-23-2012 |
| 20120271464 | Controller for Reducing Vibrations in Mechanical Systems - Vibration in a mechanical system driven by a motor connected to a load is reduced by providing an angular position and an angular velocity of the motor to a linear feedback term and to a nonlinear feedback term. Outputs of the linear feedback term and the nonlinear feed term, and an optimal feedforward term determined off-line are summed to produce a summed signal, which is fed back to control a torque of the motor. | 10-25-2012 |
| 20120277917 | METHODS AND DEVICES FOR ACTIVE VIBRATION DAMPING OF AN OPTICAL STRUCTURE - A vibration damper assembly that may be attached and moved about a payload or optical mount surface of an optical structure such as an optical table. The vibration damper assembly may include a sensor and an actuator that may be disposed within a housing. In some embodiments, the vibration damper assembly or components thereof may be incorporated into an optical structure in the form of an optical component to be disposed or mounted on an optical mount surface of an optical structure such as an optical table. Embodiments of the vibration damper system may include a controller in communication with the damper assembly Embodiments of the controller may use adaptive tuning, auto-ranging selection of gain factors and other features in order to optimize damping performance. | 11-01-2012 |
| 20130079933 | CIRCUMVENTING FREQUENCY EXCITATIONS IN A COMPUTER SYSTEM - The described embodiments relate generally to control of rotational components in a computer system. In one embodiment, the rotational component includes a cooling fan assembly, the cooling fan assembly being controlled in accordance with resonant frequency avoidance data. The resonant frequency avoidance data being characteristic of the computer system such that when the cooling fan assembly operates in accordance with the resonant frequency avoidance data, the cooling fan assembly does not operate at a fan speed that is coincident with a natural resonant frequency of the computer system. | 03-28-2013 |
| 20130085617 | VELOCITY-PROPORTIONAL ACTIVE VIBRATION DAMPING - An active vibration damper has a damping device arranged on a vibration-susceptible mechanical structure. A force can be injected directly into the vibration-susceptible mechanical structure with the damping device. A damping force which damps a vibration of the mechanical structure is determined by a control device of the active vibration damper with reference to an absolute movement of the mechanical structure in space. A damping drive of the damping device which is arranged on the mechanical structure is activated by the control device in accordance with the determined damping force such that the determined damping force is injected into the mechanical structure with the damping drive. The control device determines the damping force such that the damping force is proportional at all times to the instantaneous velocity of the mechanical structure. | 04-04-2013 |
| 20130166076 | ACOUSTIC NOISE MANAGEMENT THROUGH CONTROL OF ELECTRICAL DEVICE OPERATIONS - Technologies are generally described for automatically managing noise profile in a predefined area by determining a desired noise profile within the predefined area, monitoring noise levels and/or frequencies within the predefined area, and adjusting operational aspects of one or more noise emitting devices in order to achieve the desired noise profile within the predefined area. A noise management system according to embodiments may be centrally controlled or organized in a distributed manner with control modules on individual noise emitting devices interacting through wired or wireless media. Furthermore, the adjustment of the operations of the noise emitting devices in order to achieve the desired noise profile may be accomplished through computing an acoustic transfer function or measuring actual noise levels/frequencies. | 06-27-2013 |
| 20130166077 | APPARATUS AND METHOD OF VIBRATION CONTROL - Vibration control apparatus for controlling vibration of a structure ( | 06-27-2013 |
| 20130226355 | NUMERICAL CONTROL MACHINE - A numerical control machine estimates a future rotational speed ahead by a delay time that is a phase difference between a rotational speed fluctuation of a main spindle and a feed rate fluctuation of a feed axis, and fluctuates the feed rate such that a constant ratio is maintained with the estimated rotational speed. | 08-29-2013 |
| 20130238146 | METHOD AND DEVICE FOR ACTIVE CONTROL OF MECHANICAL VIBRATIONS BY IMPLEMENTATION OF A CONTROL LAW CONSISTING OF A CENTRAL CORRECTOR AND A YOULA PARAMETER - A method and a device are based on the application of an active correcting system with central corrector and Youla parameter for the attenuation of essentially monofrequency mechanical vibratory perturbations generated in a material structure by a rotating machine. Previously, a control law corresponding to a block modeling of the system is established and calculated, the blocks being, on the other hand, those of the central corrector and, on the other hand, a Youla parameter block, the modeling being such that only the Youla parameter, in the form of an infinite impulse response filter, has coefficients dependent on the vibratory perturbation frequency. During a phase of use, in real time, the frequency of the current perturbation is determined and the control law is calculated using for the Youla parameter the stored coefficients of a determined perturbation frequency corresponding to the current perturbation frequency. | 09-12-2013 |
| 20130245839 | HOT-BEVERAGE PREPARATION APPARATUS HAVING A DATA TRANSMISSION DEVICE - A hot-beverage preparation apparatus, in particular a capsule machine, includes an actuator which generates sound emissions and/or vibrations and/or electromagnetic emissions and which can be operated in a normal operating mode for the purpose of preparing hot beverages. The hot-beverage preparation apparatus is designed to transmit data to a receiving device. The actuator can be operated at least in a data transmission mode, which generates sound emissions and/or vibrations and/or electromagnetic emissions, for the purpose of transmitting data to a receiving device. | 09-19-2013 |
| 20130261811 | ELECTRONIC APPARATUS AND VIBRATING METHOD - A portable terminal apparatus (electronic apparatus) includes a plurality of vibration devices, disposed at different positions, which generate vibrations, and a control unit that independently controls frequencies or strengths of the vibrations generated by the plurality of vibration devices for each of the vibration devices. | 10-03-2013 |
| 20130304262 | System and Method for Controlling Semi-Active Actuators - A set of semi-active actuators is arranged in an elevator system to compensate a vibration of an elevator car. The actuators are controlled in accordance with the control policy based on a measured signal including values of the parameter measured during the operation of the elevator system. The control policy is determined, based on a model of the elevator system, wherein the control policy includes a state function representing an operation of the elevator system and a function of displacement representing an operation of the set of semi-active actuators. The state function is approximated, using the model of the elevator system, as a first function of a parameter representing the vibration. The function of displacement is approximated, using the model of the elevator system, as a second function of the parameter. | 11-14-2013 |
| 20130317657 | DRIVE VIBRATION PREVENTION SYSTEM - A drive vibration prevention system includes a fan and a drive. The drive includes a vibration detection device and a vibration notification pin. A management engine is coupled to the drive and the fan. The management engine is operable to determine whether the vibration notification pin is being asserted in response to the vibration detection device detecting a vibration that exceeds a predetermined threshold. In response to determining that the vibration notification pin is being asserted, the management engine retrieves vibration data from the drive. The management engine then modifies a fan speed of the fan using the vibration data. Drives may be grouped into drive groups that output a single vibration notification signal to the management engine, and in response to the assertion of a vibration notification pin in the drive group, the management engine retrieves vibration data from each of the drives in that drive group. | 11-28-2013 |
| 20140039693 | INPUT/OUTPUT CONNECTOR CONTACT CLEANING - In some examples, a portable data terminal (PDT) is configured to vibrate when it is installed in a base (e.g., of a docking station), which may help improve the electrical contact between the PDT and the base. For example, when the PDT is installed in a base and subsequently vibrated, the electrical contacts of the PDT may vibrate against opposing electrical contacts in the base, which may help remove contaminants, such as dirt and other debris, from between the electrical contacts of the PDT and the base. | 02-06-2014 |
| 20140039694 | PERIODICITY DISTURBANCE SUPPRESSION DEVICE AND PERIODICITY DISTURBANCE SUPPRESSION METHOD - In a torque ripple suppression control effected by a periodicity disturbance observer, it is necessary to consider plant fluctuation and fluctuation of plant characteristics caused by over time usage. Thus, improvement for robustness to an identification model error has been required. For fulfilling this requirement, there is provided a system that includes a phase correction amount calculation portion | 02-06-2014 |
| 20140094973 | SENSED SOUND LEVEL BASED FAN SPEED ADJUSTMENT - Sounds sensed by a microphone of a device include sounds from a cooling fan of the device that varies based on the speed of the cooling fan, and other sounds used by a program of the device such as voice inputs. The sound level of sounds used by the program is determined, and the speed of the fan is adjusted so that a desired cooling level is attained while keeping the fan speed low enough that the noise from the fan does not interfere with the sounds used by the program. | 04-03-2014 |
| 20140100701 | CONTROL DEVICE - A control device configured with a torque/current computation section, an actual current computation section, a current feedback control section, and a voltage control section. A two-axis rotating coordinate system has a first axis defined in a direction of field magnetic flux of a magnet provided in the rotor, and a second axis defined in a direction that is shifted by an electrical angle of 90 degrees with respect to the first axis. In the case where a torque command includes periodic torque vibration, the torque/current computation section executes first-axis command fixation control in which a first-axis current command, which is a first-axis component of the two-phase current command, is fixed at a predetermined value and a second-axis current command, which is a second-axis component of the two-phase current command, is vibrated in accordance with the torque vibration. | 04-10-2014 |
| 20140121844 | METHODS AND DEVICES FOR ACTIVE VIBRATION DAMPING OF AN OPTICAL STRUCTURE - A vibration damper assembly that may be attached and moved about a payload or optical mount surface of an optical structure such as an optical table. The vibration damper assembly may include a sensor and an actuator that may be disposed within a housing. In some embodiments, the vibration damper assembly or components thereof may be incorporated into an optical structure in the form of an optical component to be disposed or mounted on an optical mount surface of an optical structure such as an optical table. Embodiments of the vibration damper system may include a controller in communication with the damper assembly Embodiments of the controller may use adaptive tuning, auto-ranging selection of gain factors and other features in order to optimize damping performance. | 05-01-2014 |
| 20140180484 | FAN NOISE AND VIBRATION ELIMINATION SYSTEM - A fan noise and vibration elimination system includes a sound wave sensor, a vibration sensor, a computing controller, a sound wave generator and a vibration generator. The sound wave sensor and the vibration sensor respectively receive noise and vibration produced by a fan during operation thereof to generate corresponding sound wave detection signal and vibration detection signal to the computing controller. Based on the received sound wave detection signal and vibration detection signal, the computing controller generates a sound wave cancel-out signal and a vibration cancel-out signal to the sound wave generator and the vibration generator, respectively, for the latter to generate a phase-inverted sound wave and a reverse vibration frequency to cancel the noise and the vibration produced by the operating fan. | 06-26-2014 |
| 20140297044 | Acoustic-Pulser Feedback and Power Factor Control of a HIFU Device - A method and system for adjusting a HIFU device compensates for shifts in transducer impedance so that the acoustic output from a HIFU transducer remains at a desired level. In accordance with a first aspect, the disclosure includes dynamically adjusting the tuning of a tuning network that causes the transducer/system to maintain an optimal power transfer to the acoustic output. In accordance with a second aspect, the disclosure monitors the acoustic output of the HIFU device and adjusts the electrical signal provided to the HIFU transducer to maintain a desired acoustic output. | 10-02-2014 |
| 20150039138 | VIBRATION SUPPRESSING APPARATUS AND VIBRATION SUPPRESSING METHOD THEREOF - A vibration suppressing apparatus and a vibration suppressing method thereof are provided. The vibration amplitude, vibration frequency, and vibration phase of a vibration suppressing unit are adjusted in real-time according to the vibration amplitude, vibration frequency and vibration phase of a vibration source. | 02-05-2015 |
| 20150039139 | AUTOMATED SYSTEM TO DETERMINE VARIABLE FREQUENCY DRIVE SKIP FREQUENCY BANDS FOR VIBRATION CONTROL - A vibration control system for a variable speed cooling system includes a programmable controller in communication with a variable frequency drive (VFD). The programmable controller is programmed to command the VFD to operate at frequencies only outside of one or more frequency lockout bands automatically calculated by the programmable controller based on a comparison of newly acquired variable speed cooling system vibration data with previously stored variable speed cooling system vibration specification data. | 02-05-2015 |
| 20150051742 | VIBRATION PROTECTION IN A VARIABLE SPEED COMPRESSOR - A system and method are provided for a variable speed compressor with a control module that controls an operating frequency of the variable speed compressor. The control module stores a prohibited frequency range that includes a resonant frequency of the variable speed compressor and an allowed upper frequency above the prohibited frequency range and an allowed lower frequency below the prohibited frequency range. The control module determines a requested frequency and operates the variable speed compressor at the allowed upper frequency for an upper frequency operating time and at the allowed lower frequency for a lower frequency operating time when the requested frequency is within the prohibited frequency range. The control module determines the upper frequency operating time and the lower frequency operating time such that a time-averaged frequency output over the upper frequency operating time and the lower frequency operating time corresponds to the requested frequency. | 02-19-2015 |
| 20150081110 | SYNCHRONIZED ARRAY OF VIBRATION ACTUATORS IN A NETWORK TOPOLOGY - The disclosure relates to a Synchronized Array of Vibration Actuators in a Network Topology providing synchronized arrays of low-cost, readily available vibration actuators to emulate superlative single actuators and bring together sets of these emulated high-performance actuators to create a broad range of desired control effects. Such actuator arrays may operate in both spatial and temporal modes, creating haptic effects that relate to the user via their position and orientation in space. The spatial mode may create h-pulses or the amplitude of a vibrational effect may change based on position of the device. The temporal mode may create vibrational effects that interact with the user to create an awareness of time. Additionally modes include performance, bandwidth, magnitude and reliability modes. The different control modalities may be combined together into a single vector control space, which spans the haptic capabilities of sets and/or subsets of actuators. | 03-19-2015 |
| 20150142182 | ACTIVE ANTI-VIBRATION APPARATUS, ANTI-VIBRATION METHOD, PROCESSING DEVICE, INSPECTION DEVICE, EXPOSURE DEVICE, AND WORKPIECE MANUFACTURING METHOD - An active anti-vibration apparatus is provided that supports a wide range of vibration accelerations using only one type of anti-vibration mechanism. Upon occurrence of an excessive acceleration, the active anti-vibration apparatus performs switching such that an acceleration detection gain | 05-21-2015 |
| 20150342119 | A COMBINE HARVESTER COMPRISING A STRAW WALKER CONTROL SYSTEM - A combine harvester has an inclination module coupled to the straw walker control system. The inclination module provides information on the inclination of the combine harvester. The straw walker control system is further configured to control the controllable frequency of the oscillating movement in function of the information on the inclination of the combine harvester. | 12-03-2015 |
| 20150346739 | DEVICES, SYSTEMS, AND METHODS FOR ACTIVE VIBRATION CONTROL FORCE, SPEED AND VIBRATION MONITORING AND CONTROL - The present subject matter relates to systems and methods for active vibration control system speed monitoring and control in which a speed protection monitor configured to receive index pulses as inputs to monitor the speed of one or more force generators. A rotary actuator control system can be connected in communication with the speed protection monitor and the one or more force generators, wherein the rotary actuator control system is configured to shut down or adjust the speed of the one or more force generators if the one or more force generators are determined to be operating at undesired speeds. | 12-03-2015 |
| 20150361959 | ADJUSTED OPERATING TIME - A method for determining an adjusted operating time of a component in a rotating system, the method comprising steps of: during operation of the rotating system, measuring a value of an operating characteristic of a component for a predetermined period of time, determining an average of the measured value of the operating characteristic for the predetermined period of time, determining a ratio of the average and a maximum value of the operating characteristic, and determining the adjusted operating time as the product of the ratio and the predetermined period of time. The method is also adapted to a system. | 12-17-2015 |
| 20150370266 | ACTIVE NOISE AND VIBRATION CONTROL SYSTEMS AND - Active noise and vibration control (ANVC) systems and methods are provided. The systems and methods include providing sensors configured to detect vibration of a structure and a controller in electrical communication with the sensors. The controller includes a hardware processor and a memory element configured to process the vibration detected by the sensors, generate a force control command signal, and output the force control command signal via an interface. The systems and methods include provisions for at least one circular force generator (CFG) in electrical communication with the controller, the CFG is configured to execute the force control command signal output from the controller and produce a force that substantially cancels the vibration force. In some aspects, one or more CFGs control different vibration frequencies causing unwanted vibrations or acoustical tones. In some aspects, one or more CFG's control unwanted vibrations during some conditions and noise during other conditions. | 12-24-2015 |
| 20160004262 | SPATIAL STABILIZATION DEVICE, SPATIAL STABILIZATION METHOD, AND STORAGE MEDIUM FOR SPATIAL STABILIZATION PROGRAM - Provided is a spatial stabilization apparatus that realizes high spatial stability with a single inertial sensor. The present invention includes: a first object that is rotatably connected to a moving body; a second object that is rotatably connected to the first object; means that measures angular velocity of either the moving body or the first object and outputs a first detected signal that includes one or more components of an orthogonal coordinate system that is fixed to either the moving body or the first object; means that outputs an estimated signal that is estimated or detected angular velocity with respect to a first angle of the first object in relation to the moving body: means that outputs a target angle signal of the first angle; means that outputs a target angle signal of a second angle of the second object in relation to the first object; means that outputs a second detected signal obtained by adding a signal based on the estimated signal and a signal based on the first detected signal; means that controls the first angle based on a signal based on the target angle signal of the first angle and a signal based on the first detected signal; and means that controls the second angle based on a signal based on the target angle signal of the second angle and a signal based on the second detected signal. | 01-07-2016 |
| 20160041533 | MOTOR CONTROL DEVICE - A motor control device. When the motor control device executes pressure control of which a minor loop is speed control or position control, the pressure control is executed in a manner that pressurization or depressurization is performed while a control parameter of the speed control is fixed; a control parameter of the pressure control is gradually increased; an oscillation amount is successively detected and stored. If the oscillation amount exceeds an acceptable value, on the basis of the control parameter of the pressure control and the oscillation amount stored during adjustment, the control parameter of the pressure control is adjusted such that the oscillation amount is equal to or less than the acceptable value. | 02-11-2016 |
| 20160131568 | METHOD AND SYSTEM FOR DETECTING AN AIRBORNE TRIGGER - An apparatus includes a communication interface configured to receive sensor data from a sensor device. The sensor device includes a resonator including a material having an affinity for a compound, and the sensor data is indicative of a vibrational frequency of the resonator. The apparatus also includes a processor to analyze the sensor data and to generate an output based on the sensor data. | 05-12-2016 |
| 20160139615 | CHANGING SET POINTS IN A RESONANT SYSTEM - A method for changing a set point of a system where period of a dominant resonance of the system is determined, a change profile for the set point change is processed; a time period for the set point change based on the period of the dominant resonance in order to minimize excitation of the dominant resonance is also processed; and the set point change is actioned according to the processed change profile and the time period. | 05-19-2016 |
