KOREA AEROSPACE RESEARCH INSTITUTE Patent applications |
Patent application number | Title | Published |
20150134295 | CSM-BASED ANALYSIS SYSTEM FOR COLLISION RISK - The present invention relates to a conjunction summary message (CSM)-based analysis system for a collision that includes space debris which moves in space, a user satellite which is operated by a user, a joint space operations center server which receives information collected through a space debris monitoring satellite and radar or an optical camera and calculates orbit information and covariance information about the user satellite and the space debris, and a collision risk analysis server which analyzes a collision risk between the satellite and the space debris based on the orbit information and the covariance information calculated by the joint space operations center server, thereby having effects on improving precise prediction of collision between the satellite and the space debris based on a CSM informing the collision risk between the satellite and the space debris while operating a global space monitoring network, and significantly reducing a total time taken in determining and analyzing a precise orbit of the space debris and making an optimized collision-avoidance maneuver plan, through the effective user interface and system. | 05-14-2015 |
20150051758 | Method and System for Landing of Unmanned Aerial Vehicle - A method and a system for landing an Unmanned Aerial Vehicle (UAV) are provided. The method for landing the UAV includes recognizing a mark installed to the UAV through a plurality of vision sensors installed around a landing point of the UAV, and calculating a relative location of the UAV based on the landing point using the mark recognized by the vision sensors. Hence, the plurality of the sensors installed near the landing point can calculate more precise location and position of the UAV using the relative location of the UAV and the absolute location of the landing point by recognizing the mark attached to the UAV, and thus the UAV can land on the landing point accurately. | 02-19-2015 |
20150024203 | METHOD OF MANUFACTURING UNEVENNESS SHAPED Z-PIN AND Z-PIN MANUFACTURED USING THE SAME AND COMPOSITE STRUCTURE INCLUDING THE Z-PIN - Provided are a method of manufacturing a Z-pin having an unevenness shape formed on a surface thereof so as to economically and effectively increase coupling force in the Z-pin for coupling of a composite material laminated structure in a laminated direction, and a Z-pin manufactured using the same and a composite structure including the Z-pin. | 01-22-2015 |
20150012577 | SIGNAL PROCESSING DEVICE AND METHOD - The present invention relates to a signal processing device and method. The device receives, from a sensor which measures a physical quantity applied thereto and outputs an accumulated or integrated value of the physical quantity as an M-bit digital value, the digital value, and, when a difference between the physical quantities at two successive data acquisition times lies within a predetermined range and an absolute value of a digital counter increment is greater than 2 | 01-08-2015 |
20140355672 | METHOD FOR FOUR-PATH TREE STRUCTURED VECTOR QUANTIZATION - Disclosed is a method for four-path tree structured vector quantization, comprising: (a) placing codebook vectors where magnitudes of vectors are arranged in order at lowermost nodes; (b) configuring upper nodes by averaging vector values of the lowermost adjacent four nodes; (c) calculating mean square errors to paths of the upper nodes (A, B, C, and D) corresponding to four paths from an input vector ‘X’; (d) presetting a threshold between 0 and 1 after the ‘(c)’; (e) calculating thresholds between the input vector ‘X’ and four paths ‘A’, ‘B’, ‘C’, and ‘D’, based on the mean square errors; and (f) comparing the thresholds calculated in the ‘(d)’ with the preset threshold to select a path having a threshold greater than the preset threshold, in which dynamic four-path tree structured vector quantization is used instead of conventional dynamic two-path tree structured vector quantization, thereby more efficiently and quickly searching a codebook. | 12-04-2014 |
20140252776 | HIGH-ALTITUDE WIND POWER GENERATION SYSTEM WITH CYCLOIDAL TURBINE AND MOTOR-GENERATOR, AND METHOD OF OPERATING THE SAME - A high-altitude wind power generation system with a cycloidal turbine and a motor-generator, and a method of operating the same. The system includes a buoyant apparatus configured to be inflated when buoyancy generating gas is injected therein; a cycloidal turbine configured to be placed under the buoyant apparatus, and comprise a rotary shaft arranged to be substantially horizontal to the ground, and a plurality of blades arranged along a circumferential direction of the rotary shaft while their pitch center lines are long extended to be parallel with a center line of the rotary shaft and are spaced apart from the rotary shaft at a preset distance as being arranged to be substantially perpendicular to a flowing direction of fluid blowing from a front, having pitch angles individually adjustable with respect to the pitch center line; and a motor-generator configured to connect with the rotary shaft of the cycloidal turbine. | 09-11-2014 |
20140210269 | POWER SUPPLY SYSTEM HAVING AN EMERGENCY POWER SUPPLY CUTOFF FUNCTION - A power supply system having a power supply cut-off function in an emergency is provided. The present system includes a power supply device for receiving and supplying external input power to a device for power supply, a remote controller for controlling an operation of the power supply device according to a remote control signal from a remote place, an uninterruptible power supply device for supplying operation power to the remote controller, a first line switch for, when a power switch is turned on, supplying the external input power to the power supply device and the uninterruptible power supply device, and a second line switch disposed between the power supply device and the first line switch and cutting off the external input power supplied to the power supply device via the first line switch when the uninterruptible power supply device does not output the power. According to the present invention, even when the remote controller is out of order in the emergency, the power supply of the power supply device can be cut off using the interrupted power supply device to thus enhance stability and reliability of the equipment. | 07-31-2014 |
20140185940 | Apparatus and Method for Calculating Satellite Navigation Visibility - Provided is a satellite navigation visibility calculation apparatus. The satellite navigation visibility calculation apparatus includes a processing unit configured to binarize an input sky view image to create an binary image, an extraction unit configured to extract a plurality of feature points from the binary image, and a calculation unit configured to calculate satellite navigation dilution of precision (DOP) corresponding to the sky view image using the plurality of feature points. | 07-03-2014 |
20140055876 | METHOD FOR CONTROLLING LAND SURFACE TEMPERATURE USING STRATOSPHERIC AIRSHIPS AND REFLECTOR - The present invention relates to a method for controlling land surface temperature using stratospheric airships and a reflector. In the method for controlling land surface temperature using stratospheric airships and a reflector, four corners are connected to a lower end of support lines coupled to be disposed vertically downward from a plurality of airships, and sunlight is reflected by a reflector unfolded into a tetragonal shape in the air, wherein the reflecting surface of the reflector plate is maintained at an angle to remain perpendicular to an incident angle of sunlight to shield the land surface from incident sunlight. | 02-27-2014 |
20140020409 | CRYOCOOLER WITH VARIABLE COMPRESSION DEPENDING ON VARIATIONS IN LOAD - A cryocooler, includes a cylinder filled with gas. A piston rectilinearly reciprocates inside of the cylinder and compresses or expands the gas. A connecting rod has a first side coupled to the piston and moves with the piston, and a second side having a first thread along an outer circumference thereof. A linear motor rectilinearly reciprocates a motor shaft toward the connecting rod in accordance with a control signal. A sleeve has two open sides, so that an end portion of the motor shaft can be supported by and inserted in one open side, and the second side of the connecting rod can be inserted in the other open side, and an inner circumference of the sleeve is formed with a second thread that engages with the first thread of the connecting rod and rotates to adjust a distance between the motor shaft and the connecting rod. | 01-23-2014 |
20130335267 | DETECTING METHOD OF GPS CLOCK SIGNAL JUMP USING CARRIER PHASE MEASUREMENTS IN REAL-TIME - Provided is a method of detecting GPS clock signal jump, comprising a data obtaining step of obtaining GPS carrier phase measurements from a GPS receiver and satellite orbits from IGS to detect the GPS clock signal jump; a GPS clock bias calculating step of eliminating errors included in the data obtained from the data obtaining step and calculating GPS clock bias; a Teager energy calculating step of applying a Teager energy operator to the GPS clock bias calculated with respect to each satellite in the GPS clock bias calculating step and calculating Teager energy to determine whether the GPS clock jump is occurred; and a GPS clock jump detecting step of checking whether a Teager energy is larger than a threshold value. Therefore, the present invention can effectively detect the GPS clock signal jump in real-time. | 12-19-2013 |
20130175968 | MULTISTAGE CONTROL METHOD OF FLOW CONTROL VALVE USING DC MOTOR - A multistage control method of a flow rate control valve which is opened or closed when a DC motor rotates. The method includes dividing angular speed limit areas of the DC motor depending on stages based on limit values so that angular speed values of the DC motor are to be scheduled depending on the stages and controlling the DC motor to rotate at a determined angular speed value depending on a corresponding angular speed instruction to the DC motor within one angular speed limit area. When the angular speed value of the DC motor is outside a limit value of the corresponding angular speed limit area, the DC motor rotates at a determined angular speed value until reaching outside a limit value of the corresponding limit area depending on a corresponding angular speed instruction to the DC motor within an angular speed limit area of the next stage. | 07-11-2013 |
20130136888 | COMPOSITE HONEYCOMB SANDWICH PANEL EQUIPPED WITH COMPOSITE-RAIL ALUMINUM I-SHAPE SIDE INSERT - The present invention relates to a composite honeycomb sandwich panel equipped with a composite rail aluminum I-shaped side insert, and more specifically, to an improved structure of a hybrid composite sandwich panel having a laminated composite skin and an aluminum honeycomb core which is mechanically improved in terms of assembly, strength and weight. The composite honeycomb sandwich panel includes: a planar honeycomb core; a composite rail which is wrapped around the periphery of the honeycomb core and has therein a hollow space that is open on opposite sides thereof; an I-shaped center rail insert which is fitted into the hollow space of the composite rail so that the sandwich panel is connected to an adjacent sandwich panel by bolting through the I-shaped center rail insert; and laminated composite skins which cover upper and lower surfaces of the honeycomb core having the composite rail wrapped around. | 05-30-2013 |
20130105007 | FLOW CONTROL VALVE | 05-02-2013 |
20130026302 | HIGH PERFORMANCE TILT ROTOR AIRCRAFT IN WHICH NACELLE TILT ANGLE AND FLAPERON ANGLE MECHANICALLY INTERWORK WITH EACH OTHER - Provided is a high performance tilt rotor aircraft in which a nacelle tilt angle and a flaperon angle mechanically interlock with each other. In the tilt rotor aircraft having nacelles in which rotors are mounted in left and right main wings and configured so that the nacelles rotate according to whether the tilt rotor aircraft conducts forward flight or vertical take-off and landing flight, each of the main wings is provided with a flaperon, and the nacelle and the flaperon are connected to each other by a power transfer unit, such that the flaperon also rotates together with the nacelle at the time of rotation of the nacelle, thereby allowing a change in a nacelle tilt angle to lead to a change in a flaperon angle. | 01-31-2013 |
20130019148 | APPARATUS AND METHOD FOR UPDATING ONLINE DOCUMENTAANM LEE; Soo JeonAACI DaejeonAACO KRAAGP LEE; Soo Jeon Daejeon KRAANM LEE; Byoung SunAACI DaejeonAACO KRAAGP LEE; Byoung Sun Daejeon KRAANM KIM; In JunAACI DaejeonAACO KRAAGP KIM; In Jun Daejeon KRAANM JUNG; Won ChanAACI DaejeonAACO KRAAGP JUNG; Won Chan Daejeon KRAANM HWANG; Yoo LaAACI DaejeonAACO KRAAGP HWANG; Yoo La Daejeon KRAANM KIM; Jae HoonAACI DaejeonAACO KRAAGP KIM; Jae Hoon Daejeon KR - Provided are an apparatus and a method that differently sets the access authority of a user for individual parts of an online document. For every parts of the online document, the user authority is set and the parts are edited only by a user that can access the part. Finally, the parts of the documents are combined as the final document. According to the present invention, the document is divided into parts and the access authority of the user is variously set, which results in maximizing the efficiency of editing the document. The editors of the individual parts inherit the authorities to other people, so that it is very efficient for the cooperative job of a document in the organization having a hierarchy. | 01-17-2013 |
20120283941 | METHOD OF DETERMINING DRIVE LANE USING STEERING WHEEL MODEL - Provided is a method of determining a drive lane using a steering wheel model. The method includes a step S | 11-08-2012 |
20120265453 | Air Data Sensor Device - An air data sensor device using a flow around a cylinder is provided. The air data sensor device may include a sensor measurement unit which includes a sensor body provided in a cylindrical form including a hollow inside, a plurality of pressure measurement holes disposed on an outside of the sensor body, and a thermostat attached to one side of the sensor body, and a signal processing unit which includes a pressure sensor connected to the plurality of pressure measurement holes, and a microprocessor connected to the pressure sensor to perform calculation. A main pressure measurement hole having a high pressure value may be selected from the plurality of pressure measurement holes, pressure distribution may be calculated, and at least one of an angle of attack, a static pressure, and a total pressure may be calculated using the pressure distribution. | 10-18-2012 |
20120184428 | CATALYST CARRIER FOR A SPACECRAFT THRUSTER AND METHOD FOR PREPARING SAME - The present invention relates to a carrier for supporting a catalyst for a spacecraft thruster and to a method for preparing the same, and more particularly, to a catalyst carrier for a spacecraft thruster and method for preparing the same, in which the diameter and distribution of pores of the carrier are controlled using a pore inducing material to lengthen the life of the catalyst. | 07-19-2012 |
20110320121 | NAVIGATION DEVICE AND ROAD LANE RECOGNITION METHOD THEREOF - Provided is a road lane recognition method in a navigation device, which can differentiate a road lane occupied by a vehicle running on bidirectional lanes, including estimating a vehicle location based on satellite signal received from a carrier-based navigation satellite system and correction information received from a master station; determining a drive direction of the vehicle using vehicle location information and road lane information stored in a digital map; for each road lane in the road lane information, calculating a distance between a center line of the respective road lane and the vehicle location using the vehicle location information and the road lane information; and determining the road lane having a minimum value among the calculated distances as a drive lane. | 12-29-2011 |
20110282577 | NAVIGATION SYSTEM AND METHOD OF RECOGNIZING TRAFFIC LANE USING THE SAME - Provided are a navigation system and a method of recognizing a traffic lane using the same. The navigation system includes an electronic map in which information about roads and spatial data of topographical features around roads are stored, a satellite navigational device that calculates a position and a transverse point of a vehicle on the road using satellite navigation information and the road information, a radio communication unit that receives information about positions of the navigational satellites from a base station, and a lane recognition unit that calculates the number of lane-specific visible satellites and the number of real visible satellites on the basis of information about a lane position of the electronic map, spatial data of the topographical feature located at the transverse point, and the position information of the navigational satellites, and that compares the number of lane-specific visible satellites with the number of real visible satellites to recognize a lane along which the vehicle is traveling. Thus, there are no restrictions in the aspects of installation and maintenance, and accurate lane recognition is possible without an influence on the weather conditions around the road. | 11-17-2011 |
20100329845 | TURBO-MACHINE HAVING BELLOWS UNIT FOR AUTOMATIC AXIAL THRUST CONTROL - The turbo-machine of the present invention includes a volute casing, a rotating shaft, an impeller, seals, an axial thrust control member and a bellows unit. The volute casing defines therein a fluid passage. The rotating shaft is rotatably provided in the volute casing. The impeller is coupled to the rotating shaft to draw fluid using centrifugal force. The seals are provided around the front and rear ends of the impeller to prevent leakage of fluid. The axial thrust control member is installed in the volute casing behind the impeller. The bellows unit includes the piston installed in the volute casing in a shape surrounding a circumferential outer surface of the axial thrust control member; and a bellows connected with one surface of the piston, the bellows having the predetermined elasticity; and an internal space, between the piston and the volute casing, isolated from the fluid drawn behind the impeller. | 12-30-2010 |
20100167039 | COMPOSITE LAMINATED STRUCTURE REINFORCED BY INSERTING PINS, A METHOD AND A APPARATUS FOR MAKING THE SAME AND A METHOD FOR MAKING THE APPARATUS - A composite laminated structure is reinforced by inserting pins into a device for manufacturing a composite laminated structure. The device has a bottom guide on a composite laminated structure in a pre- or post-cured state. The device has first vertical pins that are inserted into the composite laminated structure. A top guide, on the bottom guide, has guide pins that are movable in a vertical direction at positions corresponding to the first pins. | 07-01-2010 |
20100139440 | DOUBLE-WHEEL CONTROL MOMENT GYROSCOPE - Provided is a control moment gyroscope, in which a pair of momentum wheels are symmetrically disposed, thereby reducing torque noise and vibration, increasing output torque, and reducing its size. The control moment gyroscope includes a gimbal rim, a wheel frame having a first wheel frame located inside the gimbal rim and a second wheel frame having the same structure as the first wheel frame and symmetrically coupled with the first wheel frame, a first momentum wheel coupled to the first wheel frame, a second momentum wheel coupled to the second wheel frame corresponding to the first momentum wheel, a gimbal motor installed on an outer circumference of the gimbal rim and connected with first ends of the first and second wheel frames, and an angular velocity sensor installed on the outer circumference of the gimbal rim, connected with second ends of the first and second wheel frames. | 06-10-2010 |
20100064661 | INJECTOR HEAD OF LIQUID ROCKET ENGINE - An injector head of a liquid rocket engine in which a mixture of oxidizer and fuel is supplied to a combustion chamber, including an injection plate having through-holes, a partition plate mounted above the injection plate so as to define a space between itself and the injection plate, a fuel injector which injects the fuel supplied from a fuel manifold into the combustion chamber, with an upper portion thereof engaged with a lower surface of the partition plate and a lower portion thereof inserted into the through-holes of the injection plate, and an oxidizer injector engaged with an upper surface of the partition plate so as to inject the oxidizer supplied from an oxidizer manifold, wherein the partition plate is provided with an oxidizer supply hole through which the oxidizer injected from the oxidizer injector is delivered towards the fuel injected from the fuel injector. | 03-18-2010 |
20100057278 | SYSTEM FOR AUTOMATICALLY LANDING AIRCRAFT USING IMAGE SIGNALS AND METHOD OF CONTROLLING THE SAME - Disclosed herein are a system for automatically landing an aircraft using image signals and a method of controlling the system. The system includes an altimeter installed on the aircraft; a landing mark placed at a landing location on a landing runway; a camera installed on the aircraft, oriented toward the front of the aircraft, and configured to detect the shape of the landing mark in image information form; and a FCC configured to calculate the angle between the aircraft and the ground, the ground range and the slant range between the aircraft and the landing location using the altitude information measured by the altimeter, the image information of the landing mark captured by the camera, angle information composed of the pitch, roll and yaw angles of the aircraft, and the angle of entry into the landing runway, and configured to control the automatic landing of the aircraft. | 03-04-2010 |
20100043392 | MIXTURE RATIO STABILIZER FOR LIQUID PROPELLANT ROCKET ENGINE - There is provided a mixture ratio stabilizer for a liquid propellant rocket engine which comprises: a body internally having a chamber and a fuel supply hole communicating with an end of the chamber to receive fuel from a fuel supply pump, an oxidizer inlet, and a fuel outlet; a spool guide in the chamber and including a plurality of first orifices for the fuel outlet and the fuel supply hole to communicate with each other; a bellows in the chamber and having one end adjacent to the spool guide and the other end positioned adjacent to the oxidizer inlet, to expand and contract in accordance with the pressure of an oxidizer which flows into the oxidizer inlet; and a spool having a part placed in the spool guide. | 02-25-2010 |
20100024388 | Flow-Restricting Filter, Solid Propellant Gas Generator and Propulsion System Comprising the Same - The present invention discloses a flow-restricting filter capable of restricting intentionally the flow of the combustion gas from a solid propellant gas generator to an external member (for example, the nozzle) to rise up combustion pressure resulting in increasing a burning rate of the solid propellant and in reducing a burning area of the solid propellant and the overall size of the gas generator. The flow-restricting filter according to the present invention comprises a hollow member having a plurality of through holes formed thereon; and a flow-blocking plate provided at one end of the hollow member to form a space having one closed end and another opened end in the hollow member. | 02-04-2010 |
20090162191 | REAL-TIME TURBOMACHINERY BLADE BREAKAGE MONITORING UNIT AND TURBO-APPARATUS - Disclosed herein are a turbo-machinery blade breakage monitoring unit and a turbo-apparatus having the same. The blade breakage monitoring unit includes a pressure sensor disposed near a rotor having a plurality of blades to be rotated at a predetermined speed, the pressure sensor functioning to measure total pressures of the respective blades. The blade breakage monitoring unit further includes a controller electrically connected to the pressure sensor and functioning to judge whether or not each measured total pressure value, transmitted from the pressure sensor, is within a preset criterion total pressure range. With the use of the blade breakage monitoring unit, total pressures of the respective blades are monitored in real time at a position downstream of the blades when the blades are rotated at a high speed within the turbo-apparatus, such as a turbine, compressor and fan, enabling real-time monitoring of breakage of the blades. | 06-25-2009 |
20090159753 | MOMENTUM MANAGEMENT SYSTEM FOR REACTION WHEEL BY USING NULL SPACE VECTOR AND METHOD - A reaction wheel momentum management method using a null space vector is provided. In accordance with this method, when any one of at least four reaction wheels used for triaxial control is made unavailable or degraded, a degraded wheel is used as long as possible for improving the mobility of the behavior of a satellite. The method provides momentum management for an N-number of reaction wheels W | 06-25-2009 |
20080217385 | Tool for Diffusion Bonding of Multi Sheet Metal, Method of Manufacturing Structural Part Using the Same, and Structural Part Manufactured Using the Method - A method of manufacturing a structural part through diffusion bonding in solid state without secondary materials after stacking multi-sheet metal and a tool thereof are disclosed. The tool for diffusion boding of multi-sheet metal includes a top tool having a top gas inlet, a central tool coupled to the top tool for installing the multi-sheet metal inside the central tool, a bottom tool coupled to the central tool for supporting the multi-sheet metal and having a bottom gas inlet and a vacuum path for making a vacuum state or an inert gas environment, and a sealing plate interposed between the top tool and the central tool. | 09-11-2008 |