AGENCY FOR DEFENSE DEVELOPMENT Patent applications |
Patent application number | Title | Published |
20160094091 | WIDEBAND RECTENNA AND RECTIFYING APPARATUS FOR RECTENNA - A rectenna according to the present invention includes a circular-polarized patch antenna having dual slots fed by a microstrip and configured to receive and output a radio frequency (RF) signal, and a rectifying circuit configured to convert for output the RF signal, received by the circular-polarized patch antenna, into a direct current (DC) signal and transfer the DC signal from the antenna to a load, wherein the rectifying circuit comprises at least one radial stub. | 03-31-2016 |
20150253118 | MUNITIONS SAFETY AND ARMING DEVICE FOR ARTILLERY AMMUNITION, AND ARTILLERY AMMUNITION HAVING THE SAME - A munitions safety and arming device for artillery ammunition, and an artillery ammunition having the same are provided. The munitions safety and arming device for artillery ammunition includes: a body having a first movement path and a second movement path communicating with the first movement path; a mass body housed in the first movement path and moving from one side of the first movement path to the other side of the first movement path upon receiving centrifugal force based on rotation of an artillery ammunition when the artillery ammunition is fired; a slide member movably installed in the second movement path and slidably moving by a predetermined distance when pressed by the movement of the mass body; and a movement delay unit protruding from the first movement path to reduce the centrifugal force exerted on the mass body to delay a time for the mass body to move. | 09-10-2015 |
20150119599 | GEM-DINITRO ESTER ENERGETIC MATERIAL USING ESTERIFICATION AND PREPARATION METHOD THEREOF - This invention relates to a gem-dinitro ester energetic material represented by Chemical Formula 1 below, which is synthesized using esterification, and to a preparation method thereof: | 04-30-2015 |
20150099877 | ELECTRODE ACTIVE MATERIAL CONTAINING HETEROCYCLIC COMPOUND FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY CONTAINING THE SAME - An electrode active material for a lithium secondary battery using a heterocyclic compound and a lithium secondary battery including the same are provided. The heterocyclic compound, which is useful as a cathode or anode active material, includes a six-membered ring and a five-membered ring containing one or more elements selected from the group consisting of nitrogen (N), oxygen (O) and sulfur (S), and the heterocyclic compound is configured such that two pairs of carbons which form double bonds with nitrogen atoms contain a functional group linked by a single bond, thus exhibiting redox activity. | 04-09-2015 |
20150077964 | ELECTRIC PROPULSION SYSTEM OF ELECTRIC VEHICLE - An electric propulsion system of an electric vehicle according to one exemplary embodiment of the present disclosure includes a housing having an inside partitioned into a plurality of spaces, power conversion devices disposed in the partitioned spaces of the housing, respectively, a connection bar formed on one surface of the housing to electrically interconnect the power conversion devices and a battery, and adapters configured to connect the connection bar to the power conversion devices, wherein each of the adaptors comprises an inner side and an outer side, wherein the inner side of the adaptor is provided with conductor members formed to be electrically connected to electrodes of the power conversion devices when the electrodes are inserted therein, wherein the outer side of the adaptor is provided with shielding members covering the conductor members for shielding noise generated from the power conversion devices. | 03-19-2015 |
20150024428 | METHOD OF IDENTIFICATION OF SPORE-FORMING Bacillus spp. BY DIRECT In-situ ANALYSIS OF MALDI-TOF MASS SPECTROMETRY, AND ANALYSIS SYSTEM - A method of the identification of | 01-22-2015 |
20140336923 | APPARATUS AND METHOD FOR COMPUTING VEHICLE PATH BY CONSIDERING SATELLITE COMMUNICATION CHANNEL STATES - Disclosed are an apparatus and method for computing a vehicle path by considering satellite communication channel states. The method includes: searching for a plurality of candidate paths, each path connected from a starting point to a destination; analyzing a satellite communication channel state with respect to each of the candidate paths, based on a receiving sensitivity of an electric wave received from a satellite; setting one of the candidate paths as a first path, based on the analyzed satellite communication channel states; and mapping the first path onto a map, and displaying the first path on a display unit. | 11-13-2014 |
20140238130 | ACCELEROMETER - The accelerometer of the present application includes: a main body; a channel positioned in the main body and forming a predetermined movement space; a conductive droplet positioned in the movement space and moving in the movement space according to inertia; a conduction section correspondingly positioned to the movement space and coming in contact with the conductive droplet; and a resistance measurement section connected to the conduction section and measuring the electric resistance of the conduction section. | 08-28-2014 |
20140232605 | LOG-PERIODIC DIPOLE ARRAY ANTENNA AND SMART SKIN HAVING THE SAME - A log-periodic dipole array antenna according to one exemplary embodiment of the present disclosure includes a dielectric substrate, a radiating element having a plurality of lines extending from a center to an outer side and symmetrically arranged on the dielectric substrate based on the center, so as to resonate in a first frequency band and a second frequency band, the plurality of lines being connected at the center or the outer side of the radiating element in an alternating manner, the lines becoming longer going from up to down of the radiating element fed according to a predetermined long-periodic ratio, and a band stopper formed on one point for connecting the lines to each other | 08-21-2014 |
20140211352 | PROTECTION APPARATUS AND CONTROL METHOD FOR THE SAME - In a protection apparatus capable of protecting a equipment from an electromagnetic pulse and a control method thereof, the apparatus includes a switching unit configured to electrically connect or disconnect a power line to or from the equipment, a sensing unit configured to detect a current flowing on the power line at a reference time interval, and a controller configured to control the switching unit according to a pulse width of the detected current. | 07-31-2014 |
20140172401 | METHOD OF SIMULATING DISCRETE EVENT - Disclosed is a discrete event simulation method using Matlap object-oriented programming (OOP). The method of simulating a discrete event comprising a plurality of models and a root coordinator, comprises: the root coordinator's managing time schedules of the models; the root coordinator's calling a model function based on the time schedules; and the models' transmitting external input events to each other when the model function is called, based on a coupling structure of the models, wherein when the plurality of models transmit the external input events to each other, the external input events are transmitted as an input parameter of the model function. | 06-19-2014 |
20140140177 | USER-INTERFACE TARGET MOTION ANALYSIS METHOD USING TWO-DIMENSIONAL PARAMETER CONTROL AND SPEED ZOOM - Disclosed is a user-interface target motion analysis (TMA) method using two-dimensional parameter control and speed zoom, and the method includes a first step of displaying a user-interface target motion analysis screen capable of selecting an input method; a second step of receiving the input method of a user; a third step of simultaneously calculating a speed and a course by speed zoom or simultaneously calculating a course and an initial range; a fourth step of calculating an initial range or a speed by speed zoom that is not calculated in the third step; and a step of generating a result of the target motion analysis using the parameters inputted through the first to fourth steps. | 05-22-2014 |
20140139367 | METHOD FOR PRODUCING AT LEAST INFORMATION FOR TRACK FUSION AND ASSOCIATION FOR RADAR TARGET TRACKING, AND STORAGE MEDIUM THEREOF - A method for producing at least information for track association and fusion includes: collecting measurement values of targets for each sensing period; predicting state variables for the targets and error covariances for the state variables by using the collected measurement values and tracking the targets by using a reformed target tracking algorithm; transmitting track information including only data of the error covariance largest occupied among the error covariances to a fusion center; calculating similarity between the pre-stored fused track and the transmitted track information; sorting the track information by using the calculated similarity; and carrying out the track fusion based on the sorted track information. | 05-22-2014 |
20140135453 | METHOD FOR PREPARING A DIFUNCTIONAL POLY(GAP-co-THF)DIOL FOR PREPARATION OF POLYURETHANE HAVING EXCELLENT MECHANICAL PROPERTIES - Provided is a method for a poly(GAP-co-THF)diol prepolymer in which THF monomer units are copolymerized to GAP, having high difunctionality, a reduced amount of cyclic oligomer side products having a small molecular weight, a wide copolymer composition and controlled molecular weight. The resulted poly(GAP-co-THF)diol prepolymer according to the present invention is used as a binder for a high-energy PBX or composite propellant, specifically used as a binder in the preparation of polyurethane having excellent mechanical properties. | 05-15-2014 |
20140121401 | GEM-DINITRO ESTER COMPOUND AS ENERGETIC MATERIAL AND PREPARATION METHOD THEREOF - Provided is a gem-dinitro ester compound, represented by Formula 1 below: | 05-01-2014 |
20140116281 | FLYING OBJECT HAVING ONE BODY WINGS - Disclosed is a flying object in which a covering unit and a wing unit installed in a nozzle assembly are integrally formed to form a smooth outer surface of the flying object, thus minimizing drag, and the covering unit and the nozzle assembly are fastened by using a fastening member having one end fastened to a slit, thereby preventing the flying object from being damaged by thermal deformation. | 05-01-2014 |
20140104111 | METHOD FOR CALCULATING SPACING RATIO OF INTERFEROMETER ARRAY ANTENNA FOR DIRECTION FINDER - A method for calculating a spacing between antenna elements of an interferometer array antenna includes setting an azimuth of an instantaneous field of view and a distance between phase differences, and obtaining the number of phase difference lines and phase difference vectors with respect to the phase differences of the signals output in a phase comparator of a direction finder, performing a modular arithmetic for the phase difference vectors to obtain phase difference matrixes, obtaining a transformation matrix for linearly transforming the phase difference matrixes and performing the linear transformation using the transformation matrix, calculating a distance between the phase differences on a new axis generated by the linear transformation, and calculating an antenna spacing as an array spacing of the array antenna, the antenna spacing meeting that the distance between the phase differences is greater than a desired distance between phase differences. | 04-17-2014 |
20140102109 | PROPULSION SYSTEM AND ROCKET HAVING THE SAME - Disclosed is a propulsion system and a rocket having the same. The propulsion system includes: a combustion tube having a propellant therein; a nozzle installed at a rear end of the combustion tube, and configured to discharge combustion gas generated when the propellant is ignited; and a nozzle separation unit coupled to the combustion tube and the nozzle, respectively, and configured to mount the nozzle to the combustion tube, and configured to separate the nozzle from the combustion tube as at least part thereof melts when reaching a preset temperature. | 04-17-2014 |
20140065909 | CARBON COMPOSITE MATERIAL - A carbon composite material which comprises Lyocell-based carbon fiber and a carbon matrix is provided. The carbon composite material has excellent physical properties, including low thermal conductivity, excellent interfacial adhesion and excellent strength, compared to carbon composite materials prepared using conventional polyacrylonitrile-based carbon fiber, pitch-based carbon fiber or the like. In addition, the carbon composite material is environmentally friendly and has low production costs compared to carbon composite materials comprising conventional rayon-based carbon fiber produced using a highly toxic carbon disulfide solvent. | 03-06-2014 |
20140065908 | FIBER-REINFORCED COMPOSITE MATERIAL - A fiber-reinforced composite material which comprises Lyocell-based carbon fiber and polymer resin is provided. The fiber-reinforced composite material has excellent physical properties, including low thermal conductivity, excellent interfacial adhesion and excellent strength, compared to fiber-based composite materials prepared using conventional polyacrylonitrile-based carbon fiber, pitch-based carbon fiber or the like. In addition, the fiber-reinforced composite material is environmentally friendly and has low production costs compared to fiber-reinforced composite materials comprising conventional rayon-based carbon fiber produced using a highly toxic carbon disulfide solvent. | 03-06-2014 |
20140046091 | Ester-Based Reactive Plasticizer For Plastic Bonded Explosives - Disclosed is an energetic reactive plasticizer for a plastic bonded explosive (PBX), and specifically an energetic reactive plasticizer for PBX which has high performance and insensitiveness without a plasticizer leak by being bonded with a polymer binder for a plastic bonded explosive. | 02-13-2014 |
20140042825 | SWITCH FOR GENERATING LONG PULSE VOLTAGE AND APPARATUS FOR GENERATING LONG PULSE CURRENT - The long pulse voltage generating switch according to the present invention comprises a switch control unit for generating a control signal that gradually increases a frequency in a front section of a wave height of a long pulse waveform desired to be simulated and gradually decreases the gradually increased frequency in an end section; and a switch turned on and off by the generated control signal and having a constant turn-on time period while the switch is turned on and off. Therefore, a reference voltage waveform of a long pulse waveform to be simulated can be easily generated, and a long pulse current can be easily generated using the reference voltage waveform. | 02-13-2014 |
20140031593 | ETHER-BASED REACTIVE PLASTICIZER FOR PLASTIC BONDED EXPLOSIVES - Disclosed is an energetic reactive plasticizer for a plastic bonded explosive (PBX), and specifically an energetic reactive plasticizer for PBX which has high performance and insensitiveness without a plasticizer leak by being bonded with a polymer binder for a plastic bonded explosive. | 01-30-2014 |
20140031580 | Ester-Based Reactive Plasticizer For Plastic Bonded Explosives - Disclosed is an energetic reactive plasticizer for a plastic bonded explosive (PBX), and specifically an energetic reactive plasticizer for PBX which has high performance and insensitiveness without a plasticizer migration by being bonded with a polymer binder for a plastic bonded explosive. | 01-30-2014 |
20130314203 | POTENTIOMETER - The present invention is directed to a potentiometer having enhanced reliability and durability, capable of being unlimitedly used in a high-temperature environment inside a flying object (air vehicle). Said potentiometer comprises: a consecutive type potentiometer having a structure that a resistor is formed of a material having an excellent stability in a high-temperature environment, and having an excellent surface hardness so as to have a high resistance to damages; and a discrete type potentiometer having a structure that a resistor is protected by a passivation layer, and through holes are formed at the passivation layer for electrical connection with the outside, and the through holes are filled with a conductive material. | 11-28-2013 |
20130307724 | Apparatus And Method For Generating GPS Time - Disclosed therein is an apparatus for generating a GPS (Global Positioning System) time that includes: a storing portion for storing a first GPS time corresponding to a 1PPS (Pulse Per Second) signal generated from a GPS receiver for synchronization with an INS (Inertial Navigation System); and a GPS time calculating portion for, upon reception of the 1PPS signal from the GPS receiver, adding a previous first GPS time stored in the storing portion and a period of the 1PPS signal to compute a second GPS time, and storing the first GPS time corresponding to the received 1PPS signal in the storing portion, thereby generating an accurate GPS time at a generation point of the 1PPS signal. | 11-21-2013 |
20130305805 | DEVICE, SYSTEM AND METHOD FOR CALIBRATION OF CAMERA AND LASER SENSOR - Disclosed are a calibration device, a calibration system and a calibration method. The calibration device includes a camera configured to capture image information, a laser sensor configured to capture image information, a laser sensor configured to detect distance information, and a calibration module configured to perform a calibration of the camera and the laser sensor by obtaining a relation between the image information and the distance information, wherein the calibration module includes a plane member disposed to intersect a scanning surface of the laser sensor such that an intersection line is generated, and disposed within a capturing range by the camera so as to be captured by the camera, and a controller configured to perform coordinate conversions with respect to the image information and the distance information based on a ratio between one side of the plane member and the intersection line, and based on a plane member image included in the image information. Under these configurations, a calibration is performed through direct coordinate conversions with respect to image information and distance information. | 11-21-2013 |
20130298819 | CAVITATION DEVICE OF UNDERWATER MOVING BODY AND UNDERWATER MOVING BODY HAVING THE SAME - Disclosed are a cavitation device and an underwater moving body having the same. The underwater moving body includes a body; and a cavitation device for generating a cavity which encloses an outer circumferential surface of the body, wherein the cavitation device includes: a plurality of flap-up/down members rotatably connected to the body, disposed to cover the outer circumferential surface, and disposed in a circumferential direction and a lengthwise direction of the body in a matrix form; and a pressing module for flapping up the flap-up/down members such that the cavity is generated, as the flap-up/down members being rotated are inclined from the outer circumferential surface. Under this configuration, the cavitation device can freely generate a partial cavity or a super cavity on the surface of the underwater moving body. Furthermore, a ventilation module for forming a ventilated cavity may be coupled to the cavitation device. | 11-14-2013 |
20130249391 | SPARK GAP SWITCH FOR HIGH POWER ULTRA-WIDEBAND ELECTROMAGNETIC WAVE RADIATION FOR STABILIZED DISCHARGE - A spark gap switch for high power ultra-wideband electromagnetic wave radiation is provided. The spark gap switch includes a casing, electrodes, brackets and an electrode protrusion. Openings are formed in respective opposite ends of the casing. The electrodes are installed in the casing at positions spaced apart from each other in such a way that the electrodes face each other and are disposed inside the openings. The brackets are installed in the respective openings of the casing. The brackets fasten rear ends of the corresponding electrodes to the casing. The electrode protrusion is provided on a central portion of at least either of the electrodes to induce stabilized discharge. The maximum diameter of the electrodes is smaller than the inner diameter of the casing so that the circumferential outer surfaces of the electrodes do not make contact with the circumferential inner surface of the casing. | 09-26-2013 |
20130056117 | THERMOSETTING SOLID PROPELLANT COMPOSITION COMPRISING NONVOLATILE TERTIARY AMINE AND METHOD FOR CONTROLLING CURE RATE OF THE COMPOSITION - Disclosed are a nitrate ester polyether-based thermosetting solid propellant composition comprising a nonvolatile tertiary amine, and a method for controlling a viscosity buildup of the nitrate ester polyether-based thermosetting solid propellant composition characterized by adding a nonvolatile tertiary amine. | 03-07-2013 |
20130027242 | DETECTION AND TRACKING RADAR, ANTI HIGH SPEED MOBILE DEFENSE SYSTEM HAVING THE SAME AND HIGH SPEED MOBILE TRACKING METHOD OF DETECTION AND TRACKING RADAR - A detection and tracking radar includes a hazardous zone set within a preset radius based on a main body having a radar, a plurality of detection and tracking sectors configured to detect a high speed mobile approaching the main body within detection areas, the detection areas being defined by diving the hazardous zone based on an azimuth angle, and a controller configured to recognize the high speed mobile as a target based upon signals received from the detection and tracking sectors and track the target. Accordingly, rapid detection and tracking of the high speed mobile can be allowed. Also, since the detection and tracking sectors can be independently run, expansion of a radar system can be free by virtue of addition of the detection and tracking sectors. | 01-31-2013 |
20130003917 | METHOD FOR EVALUATION OF DENSITY PROFILE IN CARBON/CARBON MATERIAL AND METHOD FOR PRODUCTION OF STANDARD DENSITY TEST BLOCK USED THEREIN - Disclosed are a method for evaluating a local density profile in a carbon/carbon material and a method for producing a standard density test block capable of quantitatively evaluating the density profile in the carbon/carbon material, wherein the method for evaluating the density profile includes a first step of preparing a standard density test block to be inserted in the carbon/carbon material, wherein the standard density test block is produced by using the same type of material as the carbon/carbon material and thereafter inserted in the carbon/carbon material, a second step of radiating X-rays onto the carbon/carbon material having the standard density test block inserted so as to obtain and correct computed tomographic image, and a third step of measuring a physical density by use of a linear attenuation coefficient of the computed tomographic image, whereby the local density profile can accurately be evaluated by use of a nondestructive testing and additionally such method can be utilized as an excellent means for improving processes and ensuring quality. | 01-03-2013 |
20120306695 | METHOD AND APPARATUS FOR ADJUSTING THRESHOLD WEIGHT OF FREQUENCY DOMAIN TO IMPROVE ANTI-JAMMING PERFORMANCE AND ELIMINATE JAMMING IN GPS SYSTEM - A method and apparatus for improving anti-jamming performance are provided. A threshold value level estimated in a GPS (global positioning system) receiver RF/IF stage, a threshold value weight, a median value of a median value of a 2-8 MHz bandwidth is estimated as a threshold value with respect to a frequency component exceeding the estimated threshold value level, and an adjustable K-median threshold scheme is provided in a multi-jamming environment. | 12-06-2012 |
20120291443 | ROCKET PROPULSION DEVICE AND METHOD FOR ASSEMBLING ROCKET PROPULSION DEVICE - A rocket propulsion device including, a case having a propellant therein, the case in the form of a tube, a nozzle having at least part inserted in the case, and configured to discharge gas upon burning the propellant, and a locking unit disposed to be wound on the nozzle, the locking unit in the form of a band having both ends open, wherein a through hole for inserting the locking unit therein is formed at one region on a circumference of the case, and the both ends of the locking unit are located at a region facing the one region, whereby a rocket propulsion device having a simplified structure and a facilitated alignment of a thrust line can be implemented. | 11-22-2012 |
20120285761 | WHEEL DRIVE VEHICLE AND WHEEL CONTACT SENSING METHOD OF THE SAME - Disclosed is a wheel drive vehicle including a main body having a rotatable arm and an arm driving unit for driving the arm, a wheel rotatably mounted to the arm, respectively, and a sensing unit for sensing a non-contact state of the wheel from a ground, wherein the sensing unit includes a spring, first and second sensors, and a controller. | 11-15-2012 |
20120279302 | MEMS RESONATOR, SENSOR HAVING THE SAME AND MANUFACUTRING METHOD FOR MEMS RESONATOR - A microelectromechanical system (MEMS) resonator, a sensor having the same and a method for manufacturing the MEMS resonator are provided. The MEMS resonator includes a base substrate of the MEMS resonator, the base substrate having a recess portion recessed into one surface thereof, an oscillator mounted at the base substrate and at least partially overlapping the recess portion to be vibrated using an empty space of the recess portion, and a wire connected to the oscillator and the base substrate, respectively, to control a natural frequency of the MEMS resonator by supporting at least part of the oscillator. Accordingly, the natural frequency of the resonator can be easily controlled. | 11-08-2012 |
20120276385 | RECRYSTALLIZATION METHOD OF FINE SPHERICAL RDX PARTICLE - The present invention relates to a method for recrystallizing fine spherical cyclotrimethylenetrinitramine (Research Department Explosive, hereinafter, referred to as “RDX”) particles, and the method for recrystallizing fine spherical RDX particles according to the present invention may include (a) introducing a powder material containing RDX into a container, (b) introducing a dimethylether compressed gas into the container and dissolving the RDX to form a RDX solution, (c) releasing and decompressing the RDX solution into atmospheric pressure to form crystallized RDX particles, and (d) separating and collecting the RDX particles. | 11-01-2012 |
20120203008 | DI(AMINOGUANIDIUM) 4,4',5,5'-TETRANITRO-2,2'-BIIMIDAZOLE, AND PREPARATION METHOD THEREOF - According to the present invention, unstable hydrogen of 4,4′,5,5′-tetranitro-2,2′-biimidazole, which is a promising material for insensitive high-performance molecular explosives, may be stabilized by aminoguanidium to provide di(aminoguanidium) 4,4′,5,5′-tetranitro-2,2′-biimidazole, thereby solving the hygroscopicity of 4,4′,5,5′-tetranitro-2,2′-biimidazole, and enhancing performance and insensitivity thereof. | 08-09-2012 |
20120186442 | Double Cylinder Type Hydraulic Mechanism - A hydraulic mechanism includes an outer cylinder having an expansion side working port and a contraction side working port respectively formed on a top of the outer cylinder; an inner cylinder insertedly installed inside the outer cylinder to come in and out toward a bottom of the outer cylinder; an inner rod having two flow paths respectively connected to the expansion side working port and the contraction side working port, one end of which is fixed to an inner top surface of the outer cylinder, and the other end of which passes through a top of the inner cylinder and protrudes to be positioned inside the inner cylinder; and a piston combined with the other end of the inner rod to be positioned inside the inner cylinder and formed with a hole connected to the flow path of the inner rod connected to the expansion side working port. | 07-26-2012 |
20120170414 | ACOUSTIC SIGNAL DETECTOR - Disclosed is an acoustic signal detector for detecting a target with moving in water. The acoustic signal detector may include a body having a front portion, the front portion having a cross section which becomes gradually narrow and an end formed to have a plane. The plane may be perpendicular to a moving direction of the acoustic signal detector. The acoustic signal detector may further include a plurality of sensor arrays configured to generate sound and detect sound returned by being reflected by a target. The plurality of sensor arrays may be mounted on a side surface of the front portion and on the plane. | 07-05-2012 |
20120149896 | METHOD FOR SEPARATION OF HMX AND RDX - The present invention is directed to a method for effectively separating HMX and RDX from HMX/RDX-included explosives, respectively, without using a harmful organic solvent, the method capable of respectively separating HMX and RDX from HMX/RDX-included explosives by selectively dissolving RDX included in explosives by using a difference between solubility parameters of HMX and RDX with respect to compressed dimethylether. The present invention is further directed to an apparatus for respectively separating HMX and RDX from HMX/RDX-included explosives comprising a dimethylether supplying unit, an explosive particle dissolving unit, and an explosive particle collecting unit. | 06-14-2012 |
20120072075 | STEERING CONTROL DEVICE OF AUTONOMOUS VEHICLE, AUTONOMOUS VEHICLE HAVING THE SAME AND STEERING CONTROL METHOD OF AUTONOMOUS VEHICLE - Disclosed are a steering control device of an autonomous vehicle, an autonomous vehicle having the same, and a steering control method of an autonomous vehicle. The steering control method comprises receiving a position of an autonomous vehicle, and a first heading angle of the autonomous vehicle with respect to the north; calculating a second heading angle of the autonomous vehicle toward a tracking waypoint based on the position of the autonomous vehicle, and computing a rotation radius of the autonomous vehicle with respect to the tracking waypoint; calculating a yaw rate based on a speed of the autonomous vehicle and the computed rotation radius, and generating a steering command corresponding to the calculated yaw rate; and compensating for the steering command based on the first and second heading angles. | 03-22-2012 |
20120025409 | METHOD AND APPARATUS FOR VACUUM PROCESS OF ISOSTATIC PRESSING OF POWDER MATERIAL - A method for a vacuum process of isostatic pressing of powder material comprises preparing an explosive charged rubber bag by charging a rubber bag with powder, forming a vacuum environment by putting the explosive charged rubber bag in a vacuum box, sealing an inlet of the explosive charged rubber bag which is in a vacuum state, and maintaining the vacuum state by putting the explosive charged rubber bag in a fluid contained in a reservoir by a predetermined depth in a state that the inlet of the explosive charged rubber bag has been sealed. | 02-02-2012 |
20120023893 | COOLING DEVICE FOR HIGH TEMPERATURE FLUID, FLIGHT VEHICLE HAVING THE SAME AND COOLING METHOD FOR HIGH TEMPERATURE FLUID - Disclosed are a cooling device for high temperature fluid, a flight vehicle having the same and a cooling method for high temperature fluid, the cooling device including a heat exchanger configured such that fluid is introduced therein to be heat-exchanged with a refrigerant, and configured to vaporize the refrigerant by the heat exchange such that the fluid is discharged at temperature close to vaporization temperature of the refrigerant, a compressor connected to the heat exchanger and configured to compress the fluid discharged out of the heat exchanger, a turbine connected to the compressor and configured to expand the fluid compressed in the compressor to lower temperature of the compressed fluid, and a phase change heat exchanger connected to the turbine, storing a phase change material, and configured to cause heat exchange between the phase change material and the fluid discharged out of the turbine so as to control temperature of the discharged fluid, whereby a cooling device capable of minimizing influences by external environments can be achieved. | 02-02-2012 |
20120006482 | METHOD FOR IMPROVING RUBBER BONDING PROPERTY BETWEEN RUBBER AND EPOXY-COMPOSITE - Disclosed is a method for improving the bonding property between a rubber material and an epoxy resin-based composite, particularly which can improve bonding of the rubber material to the epoxy resin-based composite without using an interfacial adhesive layer, by using, as the rubber material to be adhered to the epoxy resin-based composite, a mixture of an epoxy resin and rubber, wherein the method comprises laminating a layer of the composite and a layer of the rubber-epoxy resin mixture, and co-curing the composite layer and the rubber-epoxy resin mixture layer at the same time. | 01-12-2012 |
20110285577 | FORWARD-LOOKING 3D IMAGING RADAR AND METHOD FOR ACQUIRING 3D IMAGES USING THE SAME - Disclosure is a forward-looking 3D imaging radar, comprising: a transmitting unit which generates RF signals to be radiated for observing object in front of the radar; a transmitting antenna which radiates the RF signal generated by the transmitting unit; a receiving antenna which receives signals radiated from the transmitting antenna and reflected by the object in front of the radar; a receiving unit which mixes the signal received by the receiving antenna and the branched signal from the transmitting unit, and converts the signal to digital signal; and a signal processor which controls the operations of the transmitting unit and receiving unit, sends command to the transmitting unit to generate RF signals, receives the digitally converted signal from the receiving unit and extracts phase information of the object in front of the radar, and generates 3D radar image by producing altitude information based on the principle of interferometer. | 11-24-2011 |
20110275830 | METHOD FOR PREPARATION OF 2,4-DINITROIMIDAZOLE WHICH IS AN INTERMEDIATE FOR INSENSITIVE MELTCASTABLE MOLECULAR EXPLOSIVE - The present invention provides a method for preparing 2,4-dinitroimidazole, wherein separation of 1,4-donitroimidazole in powder form is avoided so that it is possible to eliminate allergy problems in workers and simplify the process, thereby improving process economy. | 11-10-2011 |
20110204164 | METHOD FOR PREPARING IMPREGNATING PITCH FOR CARBON-CARBON COMPOSITE - The present invention discloses a method for preparing an impregnating pitch which is used for the manufacture of carbon-carbon composites having excellent mechanical properties at an ultra high temperature, abrasion resistance and the like, wherein the impregnating pitch having a low viscosity and an improved carbonization yield is provided by facilitating cross-linking reactions between the aromatic compounds in the pitch, while eliminating heat treatment. | 08-25-2011 |
20110192139 | HYDROGEN COMBUSTION SYSTEM WITH CLOSED-CYCLE RECYCLING OF EXHAUST GAS AND METHOD THEREOF - Disclosed is a hydrogen combustion system with closed-cycle recycling comprising a hydrogen combustion system with closed-cycle recycling of exhaust gas, comprising: a hydrogen supplier 110 which supply hydrogen used as a fuel, a combustion chamber 120 which is located in the engine 130 and connected to the hydrogen supplying pipe 111 in which the hydrogen is combusted, a condenser 140 which converts the hot exhaust gas emitted through the discharge pipe 121 installed on the outlet of the combustion chamber 120 into the cold exhaust gas and condensed water, and a recycling pipe 150 which performs recycling of a part of the cold exhaust gas from the condenser 140 to the inlet of the combustion chamber 120. | 08-11-2011 |
20110109199 | ELECTROMECHANICAL TRANSDUCER AND METHOD FOR MANUFACTURING THE SAME - Disclosed is an electromechanical transducer and the method for manufacturing the same, which can detect or control deformation and vibration of a structure and flow of fluids by applying controlling forces. The electromechanical transducer of the present invention comprises a base substrate to which initial stress is applied; an electro-active material layer attached on the base substrate; and electrodes installed on the top and bottom side of the electro-active material layer for actuating the electro-active material layer, the base substrate and the electro-active material layer which is deformed when initial stress is removed from the base substrate so that the base substrate and the electro-active material layer have curvatures. | 05-12-2011 |
20110107641 | Link Type Percussion Lock - Disclosed is a percussion lock installed on a firearm, and more particularly, to a percussion lock wherein the hammer is operated through a link member so that operation of the firearm is possible in a small area, making it possible to design a firearm flexibly and reducing the volume and weight of the firearm. According to the present invention, the percussion lock installed on a firearm to fire a bullet by hitting a firing pin comprises a housing mounted in fixed state to a firearm, a hammer installed on the upper part of the housing for hitting a firing pin, a link member linking the hammer and the housing so that the hammer moves on a curve maintaining horizontal state, and an elastic member supporting the link member with elastic force. | 05-12-2011 |
20110096630 | METHOD FOR ESTIMATING TARGET RANGE ERROR AND SONAR SYSTEM THEREOF - Disclosed is an active sonar system capable of estimating a direction and a range of a target by using a sound pulse. A target range error can be estimated by the active sonar system, by applying a principle that a sound pulse used to detect an underwater target with consideration of a vertical structure of a sound velocity in water is reflected and refracted through a multipath not a linear path. | 04-28-2011 |
20110048267 | SEPARATION DEVICE OF EJECTOR MOTOR FOR PORTABLE MISSILE - Disclosed is a separation device of an ejector motor for a portable missile, capable of being separated from a missile without any additional separation devices after ejecting the missile. An ejection rocket motor and a separation device are integrally formed. Ejection is performed by a thrust generated while the ejection rocket motor is combusted, and separation is performed by cutting off shearing bolts with using a force generated from a separation cylinder when the combustion of the ejection rocket motor has been completed. This operation and configuration may minimize a weight and a space occupied by a general ejection and separation device in a missile system. | 03-03-2011 |
20110042386 | PRESSURE VESSEL FOR PROPELLANTS, EXPLOSION PREVENTING METHOD OF THE SAME, AND MANUFACTURING METHOD OF THE SAME - A pressure vessel for propellants, an explosion preventing method of the same, and a manufacturing method of the same are disclosed. The pressure vessel for propellants comprises a body provided with a cylindrical portion between a forward dome and an aft dome, and has an inner space where propellants are arranged. The pressure vessel also includes an insulation layer disposed on an inner wall of the body and configured to insulate the body from the inner space when the propellants are ignited; and a nozzle mounted at the aft dome and through which combustion material from the propellants is exhausted out. The body comprises a first hybrid fiber layer which forms the cylindrical portion, the forward dome, and the aft dome, and has a mechanical property lowered at a temperature more than a specific temperature such that the forward dome and the aft dome collapse by an inner pressure when the propellants are abnormally combusted. The body further comprises a second hybrid fiber layer which forms at least a part of the cylindrical portion, and maintains its mechanical property when the propellants are abnormally combusted. | 02-24-2011 |
20110020689 | BATTERY SYSTEM HAVING BATTERY MODULE, THERMAL SWITCH, HEATING SOURCE AND PIN STRUCTURE - A battery system ( | 01-27-2011 |
20100314490 | APPARATUS FOR DEPLOYING WING AND APPARATUS FOR LAUNCHING FLIGHT HAVING THE SAME - Disclosed are a wing deployment apparatus and an apparatus for launching a flying object having the same, the wing deployment apparatus including wings configured to be in a folded state and a deployed state, a driving unit connected to the wings, and configured to drive the wings to be switched from the folded state to the deployed state or vice versa, and a damper cooperative with the operation of the driving unit, and configured to damp a driving force of the driving unit from the start of the wings being moved to the completion of the movement of the wings. | 12-16-2010 |
20100314088 | HEAT EXCHANGER HAVING MICRO-CHANNELS - Disclosed is a heat exchanger configured by laminating layers having micro-channels by adapting a micromachining, wherein the micro-channels having uniform length and cross section are constructed within a heat exchanger body in a curved outer shape, thereby minimizing deviation for each channel and improving heat transfer efficiency. | 12-16-2010 |
20100295732 | SYSTEM AND METHOD FOR REMOVING CHANNEL PHASE ERROR IN A PHASE COMPARISON DIRECTION FINDER - System and method for removing channel phase error in a phase comparison direction finder. By using this system, the phase error, generated in the channel path in finding the direction by using the phase comparison direction finder, can be injected into the receiving channel and removed by using the frequency and intensity of the signal stored in the PDW table. Furthermore, the direction finding correction look-up table can be made using only radiation correction of the antenna unit of the direction finder and channel correction can be carried out without calibrating the direction finder for the direction finding correction look-up table when devices are replaced in the channel of receiving path of the direction finder. | 11-25-2010 |
20100294879 | WING ASSEMBLY AND APPARATUS FOR LAUNCHING FLYING OBJECT USING THE SAME - Disclosed are a wing assembly including a wing movably accommodated in a launch tube, and a buffer unit detachably mounted to the wing to come in contact with the launch tube and configured to be separated from the wing after the wing comes out of an inner space of the launch tube, and an apparatus for launching a flying object having the same. | 11-25-2010 |
20100283666 | RADAR SIGNALS CLUSTERING METHOD USING FREQUENCY MODULATION CHARACTERISTICS AND COMBINATION CHARACTERISTICS OF SIGNALS, AND SYSTEM FOR RECEIVING AND PROCESSING RADAR SIGNALS USING THE SAME - Disclosed is a radar signal clustering method using frequency modulation characteristics and combination characteristics of signals including: a first step of assigning pulses of received radar signals to cells consisting of parameters including radio frequency (RF) and angle of arrival (AOA) of the pulses; a second step of calculating a pulse density distribution of each cell using a kernel density estimator; a third step of extracting a corresponding cell as a frequency fixed cluster if the calculated pulse density distribution is greater than a threshold of the frequency fixed cluster; a fourth step of making cell groups by merging remaining cells that are not extracted as the frequency fixed clusters; a fifth step of calculating a pulse density distribution of each cell group by using the kernel density estimator for each cell group; and a sixth step of comparing the calculated pulse density distribution for each cell group with each threshold according to a signal combination type of frequency agile clusters, thus to classify and extract each cell group according to the signal combination type. | 11-11-2010 |
20100180757 | METHOD AND APPARATUS FOR LOADING CARTRIDGES WITH PRESSABLE PLASTIC BONDED EXPLOSIVES - Disclosed are an apparatus and method for loading small and medium caliber cartridges with pressable plastic bonded explosives (PBXs). A plurality of pellets are pre-formed to have a high density, and are loaded into a small and medium caliber cartridge one by one. Accordingly, a high and uniform density is obtained. And, when manufacturing small and medium caliber cartridges, the pressable PBXs are anticipated to be massively loaded into the small and medium caliber cartridges in the future. | 07-22-2010 |
20100097163 | RESONATOR HAVING A THREE DIMENSIONAL DEFECTED GROUND STRUCTURE IN TRANSMISSION LINE - A resonator having a three dimensional Defected Ground Structure (DGS) in the transmission line includes a substrate installed at the center of the resonator floating in the air through supporting members installed on both ends of the substrate; a transmission line for transmitting signals installed on the upper surface of the substrate; an upper ground plane member installed on the upper surface of the substrate with predetermined interval from the surface of the substrate, wherein a DGS pattern with a predetermined shape is formed on each portion of the body of the ground plane member symmetrically with respect to the transmission line to form a resonator; a lower ground plane member installed on the lower surface of the substrate with predetermined interval from the surface of the substrate, wherein a DGS pattern with a predetermined shape is formed on each portion of the body of the ground plane member symmetrically with respect to the transmission line to form a resonator; an upper cover installed closely contacting the upper surface of the upper ground plane member to seal the upper opening of the DGS pattern formed on the upper ground plane member and to protect the upper ground plane member at the same time; and a lower cover installed closely contacting the lower surface of the lower ground plane member to seal the lower opening of the DGS pattern formed on the lower ground plane member and to protect the lower ground plane member at the same time. | 04-22-2010 |
20100081811 | METHOD FOR THE NITRATION OF 4,6-DIHYDROXY-2-METHYLPYRIMIDINE - Disclosed is a method for the nitration of 4,6-dihydroxy-2-methylpyrimidine for the synthesis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine which is used as a precursor of 1,1-diamino-2,2-dinitroethylene, one type of explosives. The present invention provides an improved method for the nitration of 4,6-dihydroxy-2-methylpyrimidine, wherein organic solvent is applied in the nitration process of 4,6-dihydroxy-2-methylpyrimidine thereby solving the safety problem while improving the yield of nitration. | 04-01-2010 |
20100050897 | MISSILE SEPARATION DEVICE - Disclosed is a device for separating a propulsion system from a missile, the device including a locking unit configured to fix a propulsion system to a missile, a string disposed to cross a rear portion of the propulsion system to be broken by heat of the propulsion system, and an unlocking unit configured to unlock the missile by the broken string, whereby the number of additional components of an unlocking system can be reduced as many as possible so as to simplify the configuration of the apparatus, resulting in guaranteeing an enhanced performance of the missile, an easy assembly of the missile, and a reduction of a fabricating cost. | 03-04-2010 |
20090299079 | 1-GLYCIDYL-3,3-DINITROAZETIDINE CONTAINING EXPLOSIVE MOIETY AND PREPARATION METHOD THEREOF - Disclosed is a 1-glycidyl-3,3-dinitroazetidine(GDNAZ) of Formula I wherein dinitroazetidine group which is a high energy group having unit structure of explosive moiety is incorporated to a monomer, and the method thereof. By using the GDNAZ of the present invention in the synthesis of energetic binder for high-performance insensitive explosive, an energetic binder with enhanced thermal and storing stability and explosive power can be provided. | 12-03-2009 |
20080291061 | SYSTEM FOR DEVELOPMENT OF INPUT DEVICE - A system for development of an input device capable of implementing an input device of various shapes and functions by providing the same visual, haptic, and audible feedbacks as a product to be massively fabricated when the input device is designed. The system comprises: an input device for receiving a rotation input by a user, and generating tactile feedbacks corresponding to the rotation input; a display device for displaying a virtual input device having a designable appearance in an interworking manner in correspondence with the user's manipulation; and a controller for controlling the input device by being connected thereto so that the tactile feedbacks corresponding to the rotation input can be provided, and for controlling the display device so that the virtual input device can be displayed in correspondence with the user's manipulation. | 11-27-2008 |
20080272765 | Brushless DC Motor Using Linear Hall-Effect Sensor And Realization Method Of Speed Signal Thereof - Disclosed is a realization method of a speed signal of a motor using a linear Hall-effect sensor characterized by comprising the steps of: by using a Hall signal in the form of a sine wave of a linear Hall-effect sensor, determining coordinate values on a x-y coordinate system of the position sensor; evaluating a summed coordinate value of the above coordinate values; calculating the angle(θ) formed by a summed coordinate value and the x axis; determining the quadrant of the resulted angle(θ); and determining a speed signal by dividing the final motor displacement value by the rate of time change. | 11-06-2008 |
20080203189 | Apparatus for driving body with three-degree of freedom angular motion - An apparatus for driving a body with 3-degree of freedom angular motion, comprises: a body connected to a fixing part so as to be rotatable centering around a pitch axis, a yaw axis, and a roll axis; a pitch axis driving unit for rotating the body centering around the pitch axis; and a yaw axis driving unit for rotating the body centering around the yaw axis. Since one of the pitch axis driving unit and the yaw axis driving unit restricts the body from rotating centering around the roll axis fixed to the body, the conventional roll-rotation restricting link is not needed between the body and the fixing part. Accordingly, a size of the apparatus is reduced. | 08-28-2008 |