Class / Patent application number | Description | Number of patent applications / Date published |
702105000 | For mechanical system | 13 |
20080275661 | On-machine methods for identifying and compensating force-ripple and side-forces produced by actuators on a multiple-axis stage - Methods, apparatus, and systems are disclosed for identifying force-ripple and/or side-forces in actuators used for moving a multiple-axis stage. The identified force-ripple and/or side-forces can be mapped, and maps of corresponding position-dependent compensation ratios useful for correcting same are obtained. The methods are especially useful for stages providing motion in at least one degree of freedom using multiple (redundant) actuators. In an exemplary method a stage member is displaced, using at least one selected actuator, multiple times over a set distance in the range of motion of the subject actuator(s). Each displacement has a predetermined trajectory and respective starting point in the range. For each displacement, respective section force-command(s) are extracted and normalized to a reference section force-command to define a section compensation-ratio. Multiple section compensation-ratios are assembled, as functions of displacement in the range, to provide a map of compensation ratios for the actuator(s) throughout the range. | 11-06-2008 |
20090150111 | METHOD FOR OPTIMIZING CALIBRATION MAPS FOR AN ALGORITHM OF ESTIMATION OF A CONTROL QUANTITY OF AN INTERNAL COMBUSTION ENGINE - Described herein is a method for optimizing a plurality of calibration maps for an algorithm of estimation of a control quantity of an internal combustion engine, each of the maps comprising a plurality of calibration values of said control quantity estimated by said algorithm. The optimization method comprises measuring the control quantity, estimating the control quantity, and individually optimizing each calibration map based on the measured control quantity and the estimated control quantity. | 06-11-2009 |
20090222232 | REEL MOTOR TORQUE CALIBRATION DURING TAPE MOTION - Methods, apparatuses and systems directed to calculation of a reel motor torque constant (“K | 09-03-2009 |
20090271138 | METHODS AND APPARATUS FOR A VIRTUAL TEST CELL - A method for calibrating a physical test cell includes the steps of: determining a set of inputs to be provided to the physical test cell based in part on a set of historical test data; providing the inputs to the physical test cell and receiving a set of outputs associated therewith, wherein the providing includes implementing a sequential space filling sampling procedure to substantially cover a region defined by the set of historical values; creating a virtual test cell comprising one or more response surfaces based on the set of outputs; and interrogating the virtual test cell to determine a calibration relationship between at least one of the inputs and at least one of the outputs. Smooth Kriging may be used to determine the virtual test cell. | 10-29-2009 |
20100250181 | Information management system for drive apparatus and method of manufacturing drive apparatus - An information management system includes a storage medium storing position error information of the rotation sensor obtained based on information of the back electromotive force and output information from the rotation sensor in an inspection process in which a back electromotive force is measured by mechanically driving the rotary electrical machine after the rotary electrical machine and the rotation sensor are assembled, wherein the storage medium is provided in a state capable of being read via communication when a control device controlling the rotary electrical machine is assembled with the rotary electrical machine. | 09-30-2010 |
20110010124 | Method for determining the shape of a workpiece - Method for measuring the shape of a workpiece includes a measuring sensor used to find measured values that represent the shape of a workpiece. The shape of the workpiece is determined by an iterative method using the measured values. | 01-13-2011 |
20110029270 | DEVICE AND METHOD FOR CALIBRATING SWIVEL ASSEMBLIES, PARTICULARLY ON CUTTING MACHINES - A device and method for calibrating swivel assemblies ( | 02-03-2011 |
20120059617 | Iterative Learning Control for Motion Error Reduction - An apparatus for reducing registration errors in a media handling device. The apparatus including an image-bearing member having sheets individually pass across the image-bearing member. Each sheet pass corresponds to one of a series of iterations between the image-bearing member and the sheets. The image-bearing member is operatively coupled to a controller for regulation motion of the image-bearing member. The controller receives input signals representing at least one measured disturbance. Each disturbance being defined by a pattern of image-bearing member movement away from and substantially returning to a reference state of motion. A repetition of the pattern being coincident with at least one of the iterations, wherein based on the measured disturbance, the reference state and an indication associated with when the pattern will repeat, a modified signal is generated for the actuator to adjust the image-bearing member motion in coordination with the indication. | 03-08-2012 |
20120130668 | SYSTEM AND METHOD OF GENERATING EXTERNAL PARAMETER VALUE FOR SEPARATELY EXCITED MOTOR CONTROLLER - A system and a method of generating an external parameter value for a separately excited motor controller are disclosed, the system including: a digital signal processor to convert a received analog electrical signal into a digital signal and to scale the digital signal, so as to generate a parameter value in conformity with a data format of the system; an external parameter generating module to adjust the parameter value with a calibration coefficient to obtain the external parameter value; the calibration coefficient being generated by a calibration coefficient generating module and being pre-stored in a calibration coefficient storing module; and a calibration coefficient generating module to read the parameter value generated by the digital signal processor and obtain an actual measuring value as a reference parameter value, to calculate a difference value between the parameter value from the digital signal processor and the reference parameter value, and to generate the calibration coefficient from a ratio of the reference parameter value to the parameter value obtained from the digital signal processor if the difference value exceeds a preset value. | 05-24-2012 |
20120203490 | AUTOMATIC CALIBRATION FOR DEVICE WITH CONTROLLED MOTION RANGE - An apparatus includes a portion that moves along a guided path and a displacement gauge that outputs readings based on the portion's position on the guided path. The apparatus additionally includes an intermediate limit switch that is activated in response to the portion being moved to an intermediate position on the guided path. The apparatus also includes a processing device configured to calibrate the apparatus based on a first reading corresponding to a first position on the guided path and a second reading corresponding to a second position on the guided path. The processing device verifies the calibration based on a third reading corresponding to the intermediate position. | 08-09-2012 |
20130054175 | VIBRATION SIGNAL COMPENSATION - A system comprises a vibration sensor for generating a vibration signal on a turbomachine, a signal conditioner for conditioning the vibration signal, and a test signal generator for calibrating the signal conditioner. The test signal generator calibrates the signal conditioner with a test signal having a base frequency and a modulation frequency. The signal conditioner introduces a phase error into the vibration signal, and the signal conditioner introduces a phase shift into the test signal. A processor compensates for the phase error in the vibration signal by correcting the vibration signal based on the phase shift in the test signal, where the processor determines the phase shift in the test signal based on harmonic analysis of the modulation frequency. | 02-28-2013 |
20130245985 | Calibration Of An Optical Metrology System For Critical Dimension Application Matching - Methods and systems for matching critical dimension measurement applications at high precision across multiple optical metrology systems are presented. In one aspect, machine parameter values of a metrology system are calibrated based on critical dimension measurement data. In one further aspect, calibration of the machine parameter values is based on critical dimension measurement data collected by a target measurement system from a specimen with assigned critical dimension parameter values obtained from a reference measurement source. In another further aspect, the calibration of the machine parameter values of a target measurement system is based on measurement data without knowledge of critical dimension parameter values. In some examples, the measurement data includes critical dimension measurement data and thin film measurement data. Calibration of machine parameter values based on critical dimension data enhances application and tool-to-tool matching among systems for measurement of critical dimensions, film thickness, film composition, and overlay. | 09-19-2013 |
20130332100 | MECHANICAL TESTING INSTRUMENTS INCLUDING ONBOARD DATA - A method of calibrating a mechanical instrument assembly includes reading a memory device coupled with a mechanical testing instrument, the mechanical testing instrument having one or more mechanical characteristics with values unique to the mechanical testing instrument, and reading includes reading of one or more calibration values based on the one or more mechanical characteristic values. The method further includes calibrating the mechanical instrument assembly according to the one or more calibration values. The mechanical testing instrument is coupled with the mechanical instrument assembly. | 12-12-2013 |