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36results about How to "Good for attitude control" patented technology
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Rotated quadrotor
The invention provides a rotated quadrotor, and belongs to the technical field of aircraft design. The rotated quadrotor comprises flying rotor wings, brushless direct current motors, a fuselage, a canopy, undercarriages, a power supply unit, a flight control system, fixing tubes, a rotated rocker arm, a connecting rod, a rotated steering engine, rotor wing arms, and round heads. According to the rotated quadrotor, rotating angles of the four flying rotor wings in the front-back direction are controlled to as to realize forward flying or backward flying; installation angles of the flying rotor wings are changed so as to realize forward flying of the four flying rotor wings, maintain level condition of the fuselage, ensure that the best aerodynamic performance of the quadrotor is maintained all the time, and the maximum lifting force of the fuselage is induced, increase flying speed of the quadrotor, prolong flight duration, and improve wind resistance, operation capability, and efficiency.
Owner:BEIHANG UNIV
Layout method for 10 N thrusters of high orbit satellite platform
ActiveCN102358437AImproved attitude control and orbit control performanceEnhance countermeasuresCosmonautic propulsion system apparatusArtificial satellitesAttitude controlEngineering
The invention relates to a layout method for 10 N thrusters of a high orbit satellite platform. The assembly positions of the thrusters are not limited to facing and backing a floor and are symmetrically laid out by taking service life middle-period centroid positions as references. The layout of the 10 N thrusters is limited according to demands of users, solar wings, antennas, sensors, actuating mechanisms and the like. In the method, the requirements in all the aspects of reducing plume influence of the thrusters, avoiding structural interference, improving operation efficiency of the thrusters, saving propellants and the like are reasonably considered. The phenomenon that two 10 N thrusters are combined and matched to control pitching or yawing is prevented; the problem that large interaxial coupling exists in the daily attitude control due to thruster asymmetry is solved; when paired thrusters maintain eastward / westward positions or southward / northward positions, the maximum disturbance moment is reduced; the capability of handling faults of ignition and orbital transfer of 490 N engines is greatly improved; the operation efficiency of the thrusters is improved; and the propellants are saved.
Owner:BEIJING INST OF CONTROL ENG
De-orbit braking closed circuit guidance method satisfying constrains on reentry angles and flying ranges
ActiveCN105573337AHigh control precisionSmall amount of calculationPosition/course control in three dimensionsAnalytical expressionsEngineering
The invention discloses a de-orbit braking closed circuit guidance method satisfying constrains on reentry angles and flying ranges. The guidance method comprises steps of firstly on the basis of a nominal de-orbit braking track of a two-body dynamics model design, correcting effects on the reentry angles imposed by a J2 item by iterating working time of an engine; correcting effects on the flying ranges imposed by the J2 item by designing a dynamics integral model; during a guidance process, according to current movement states and information of reentry points, calculating currently required speed and speed gain by use of a closed analytical expression; determining an instruction posture angle of the engine according to direction of the speed gain; and determining a turn-off instruction according to the fact whether the speed gain is zero. According to the invention, high-precision and strong-robustness de-orbit braking guidance can be achieved.
Owner:NAT UNIV OF DEFENSE TECH
Autonomous thrust vectoring ring wing pod
ActiveUS20200148354A1Good for attitude controlNegates needPropellersUnmanned aerial vehiclesNacelleClassical mechanics
An autonomous thrust vectoring ring wing pod is disclosed. A plurality of distributed propulsion element (thruster) layout within a self-articulating ring wing pod allows the pod to selectively control its thrust vector by controlling each propulsion element in the pod. This arrangement allows autonomous and independent control of the tilting of the ring wing relative to the aircraft. The ring wing pod acts as both a nacelle to house the propulsion elements as well as a lifting surface when in wing-borne flight. The autonomous thrust vectoring ring wing pod also provides superior aircraft attitude control in wing-borne flight, thus negating the need for conventional surface controls.
Owner:TEXTRON INNOVATIONS
Stationary orbit ultra-large type assembling satellite platform configuration and assembling method
InactiveCN111572814AMeet the needs of on-orbit maintenanceExtended service lifeArtificial satellitesCosmonautic component separationEngineeringSatellite bus
The invention provides a stationary orbit ultra-large type assembling satellite platform configuration. The configuration comprises a mother platform, a first module cabin, a second module cabin, a first functional cabin, a second functional cabin, a first connecting truss, a second connecting truss, a first energy module, a second energy module, a first mechanical arm and a second mechanical arm,wherein the mother platform carries out comprehensive management and control on a whole satellite; the first module cabin and the second module cabin are connected with the mother platform and are used for providing a mounting platform for a ultra-large platform single-machine module; the first functional cabin and the second functional cabin are connected with the first module cabin and the second module cabin and are used for carrying a working load; the first connecting truss and the second connecting truss are mounted on the first energy module and the second energy module respectively; and the first mechanical arm and the second mechanical arm are installed on an east side and a west side of the mother platform correspondingly. The configuration can be used for an ultra-large comprehensive satellite platform, on-orbit maintenance of the satellite platform is facilitated, development cost is low, a platform configuration space is open, and energy utilization efficiency is high.
Owner:SHANGHAI SATELLITE ENG INST
Two-dimensional directing mechanism for optical remote sensing instrument
ActiveCN107218960AImprove pointing accuracyLong axis decreaseMeasurement apparatus componentsGear wheelEngineering
The invention discloses a two-dimensional directing mechanism for an optical remote sensing instrument. The two-dimensional directing mechanism comprises an upper half shaft assembly, a lower half shaft assembly, a left half shaft assembly, a right half shaft assembly, a directing mirror assembly, an inner frame, an outer frame, a support frame and a counterweight. The lower half shaft assembly and the left half shaft assembly have the same structure. The upper half shaft assembly and right half shaft assembly have the same structure. The upper half shaft assembly, the lower half shaft assembly and the inner frame constitute a pitch axis system. The left half shaft assembly, the right half shaft assembly, the outer frame and the pitch axis system form an azimuth axis system. The two-dimensional directing mechanism is high in directing precision, light in weight, low in moment of inertia, small in interference torque of satellite platform, compact in structure, simple in structure, and directly driven to avoid a complex harmonic reducer or gear reduction mechanism, and highi in reliability.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Coaxial type all-terrain wheel-legged mobile robot
InactiveCN107933731ABig room for improvementImprove obstacle performanceVehiclesTerrainObstacle negotiation
The invention relates to a coaxial type all-terrain wheel-legged mobile robot comprising a vehicle body, front legs symmetrically arranged at two sides of the front of the vehicle body, rear legs symmetrically arranged at the rear of the vehicle body and a control part arranged on the vehicle body and used for realizing the control of the front legs and the rear legs, wherein the front legs and the rear legs are connected to the vehicle body through metallic rudder disks; the front legs consist of front main arm lifting motors, front wheel steering motors, the front metallic rudder disks, front hub motors, front right-angle supports, front U-shaped supports, front motor holders, front wheels, front leg connectors and front steering motor holders; and the rear legs consist of rear main armlifting motors, rear wheel steering motors, the rear metallic rudder disks, rear hub motors, rear right-angle supports, rear U-shaped supports, rear motor holders, rear wheels, rear leg connectors andrear steering motor holders. The coaxial type all-terrain wheel-legged mobile robot has higher obstacle-negotiation ability and wider adaptability under complex road conditions.
Owner:JILIN UNIV
Self-pressurized fuel tank used for space propulsion
ActiveCN109455313ASimple structureSimple working processCosmonautic vehiclesCosmonautic propulsion system apparatusAttitude controlFuel tank
The invention provides a self-pressurized fuel tank used for space propulsion. The fuel tank comprises a shell, a piston, an upper cover, a screw nut mechanism, a motor-cone gear set, a disc spring group and a pipeline, wherein one end of the shell is externally connected with the pipeline, the other end of the shell is connected with the screw nut mechanism, the inner portion of the shell is provided with the upper cover, the disc spring group and the piston from top to bottom in sequence, the position, located in lower space of the piston, of the shell is filled with liquid fuel, the disc spring group is arranged between the piston and the upper cover, the upper end of the disc spring group is closely next to the lower end face of the upper cover, and the lower end of the disc spring group is closely next to the bottom face of the inner wall of the piston; the screw nut mechanism is connected between the upper cover and the shell, the screw nut mechanism also is connected to the motor-cone gear set, and the motor-cone gear set drives the screw nut mechanism to rotate; the outer surface of the piston is in contact with the inner surface of the shell. The fuel tank uses the elasticforce of disc springs as power to extrude fuel, and is simple in structure and conductive to the attitude control of a spacecraft.
Owner:HEBEI UNIV OF TECH
Autonomous thrust vectoring ring wing pod
ActiveUS11130568B2Good for attitude controlNegates needPropellersUnmanned aerial vehiclesNacelleFlight vehicle
An autonomous thrust vectoring ring wing pod is disclosed. A plurality of distributed propulsion element (thruster) layout within a self-articulating ring wing pod allows the pod to selectively control its thrust vector by controlling each propulsion element in the pod. This arrangement allows autonomous and independent control of the tilting of the ring wing relative to the aircraft. The ring wing pod acts as both a nacelle to house the propulsion elements as well as a lifting surface when in wing-borne flight. The autonomous thrust vectoring ring wing pod also provides superior aircraft attitude control in wing-borne flight, thus negating the need for conventional surface controls.
Owner:TEXTRON INNOVATIONS
Multi-degree of freedom spherical traveling wave-type ultrasonic motor
InactiveCN1972103AIncrease contactSimple structureAngle measurementPiezoelectric/electrostriction/magnetostriction machinesPosition angleAttitude control
This invention discloses one multiple freedom ball wave supersonic motor, which fixes one ball motor rotor in side television shell and separately fixes one wave stator matched with ball motor rotor on its front, back, left, right and bottom parts, wherein, five stators are separately fixed on television shell fixed with 90 degree position angle test structure on ball motor rotor output axis.
Owner:ZHEJIANG UNIV
Impact acceleration sensitive valve for shock absorber
InactiveCN110701234AImproved Pitching VibrationReduce the probability of suspension breakdownSpringsShock absorbersPhysicsSuspension (vehicle)
The invention belongs to the technical field of vehicle shock absorption, and particularly relates to an impact acceleration sensitive valve. The impact acceleration sensitive valve is installed on abottom valve between a working cavity and a compensation cavity of the shock absorber, and adopts a spring mass system composed of a compressed spring and a slide block for sensing impact loads on a vehicle from the pavement, and thus the purpose of judging the working condition is achieved; a hole between the slide block and a valve rod is utilized for achieving communication of a high-pressure cavity of the shock absorber, unloading of the high-pressure cavity of the shock absorber can be achieved when the shock absorber meets intense impact of the pavement, so that impact transmitted to a vehicle body by the shock absorber is reduced, and the requirement of different working conditions for damping is met. According to the impact acceleration sensitive valve, a favorable condition is created for symmetric design of damping of the shock absorber. Compression damping is increased, stretching damping is lowered, the improvement of the posture of a vehicle is facilitated, a suspension isrestored in time, and the smoothness and handling stability of the vehicle are comprehensively improved. The impact acceleration sense valve is compact in structure, high in manufacturability and controllable in cost.
Owner:CHINA NORTH VEHICLE RES INST
A tilting quadrotor aircraft
The invention provides a rotated quadrotor, and belongs to the technical field of aircraft design. The rotated quadrotor comprises flying rotor wings, brushless direct current motors, a fuselage, a canopy, undercarriages, a power supply unit, a flight control system, fixing tubes, a rotated rocker arm, a connecting rod, a rotated steering engine, rotor wing arms, and round heads. According to the rotated quadrotor, rotating angles of the four flying rotor wings in the front-back direction are controlled to as to realize forward flying or backward flying; installation angles of the flying rotor wings are changed so as to realize forward flying of the four flying rotor wings, maintain level condition of the fuselage, ensure that the best aerodynamic performance of the quadrotor is maintained all the time, and the maximum lifting force of the fuselage is induced, increase flying speed of the quadrotor, prolong flight duration, and improve wind resistance, operation capability, and efficiency.
Owner:BEIHANG UNIV
Design method of variable-structure integrated controller for reducing rolling and pitching of AUV
ActiveCN110456809AGood for attitude controlTo achieve the effect of comprehensive anti-rollingAttitude controlLow speedFin stabilizer
The invention belongs to the field of autonomous underwater vehicle navigation control, and particularly relates to a design method of a variable-structure integrated controller for reducing rolling and pitching of an AUV. A hydroplane based on a working principle of a zero-speed fin stabilizer can be used for actively reducing rolling and pitching motions during low-speed navigation. In consideration of six-degree-of-freedom nonlinear and coupling motions of the AUV and the working principle of the hydroplane, an improved variable-structure controller is designed, so that the approaching speed of an approaching process in sliding mode control is further improved, and the buffeting phenomenon of a sliding mode control system is eliminated; and the rolling and pitching interferences under different wave disturbances can be greatly reduced through the improved sliding mode integrated controller. By analyzing a simulation result, the rolling and pitching motions of the AUV can be effectively reduced.
Owner:HARBIN ENG UNIV
Multi-rotor unmanned plane
InactiveCN107150799AExtension of timePosition and attitude stabilityAircraft componentsRotocraftFlight vehicleElectric machinery
The invention discloses a multi-rotor unmanned plane, and belongs to the technical field of an unmanned plane. The multi-rotor unmanned plane comprises a plane body, a motor, a rotor wing, and a foot stool; the motor is installed at the periphery of the plane body, the rotor wing is connected to a rotary shaft of the motor; the foot stool is arranged beneath the plane body. The multi-rotor unmanned plane is characterized in that hook hanging rods are further arranged on both sides of the plane body or a rotor protecting frame, one end or both ends of each hook hanging rod is provided with hanging hooks. The multi-rotor unmanned plane can be hung on an object at high place to work through the hanging hooks on the hook hanging rods connected to both sides of the plane body or the rotor protecting frame. The lifting force of the multi-rotor unmanned machine in a hanging state is not provided by power energy of the battery, thus the working time of an onboard working device can be prolonged greatly in a rising and landing process. The multi-rotor unmanned plane can be widely applied to overhead monitoring at a fixed point, monitoring, shooting, environmental protection monitoring, urban administration, courtyard safeguard, vehicle anti-theft, express delivery, and other domains.
Owner:周良勇
Multi-rotor unmanned plane
InactiveCN106965925AStable postureStable positionAircraft componentsRotocraftElectrical batteryFlight vehicle
The invention provides a multi-rotor unmanned plane and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned plane comprises a fuselage, plane arms, motors, rotors and foot stools. One ends of the plane arms are connected with the fuselage. The motors are installed on the plane arms. The rotors are installed on rotary shafts of the motors. The foot stools are connected to the lower portion of the fuselage. In addition, two sets of hangers are arranged on the foot stools. One set of hangers are hangers with pointed tips facing downwards, and the other set of hangers are hangers with hanging openings. The multi-rotor unmanned plane can be hung on objects at high places such as enclosing walls of high-rise building roofs, advertising boards, traffic signs and balcony railings of high-rise buildings through the hangers. After the multi-rotor unmanned plane is hung on the objects at the high places, the multi-rotor unmanned plane does not need electric energy of batteries to provide lifting force, and working equipment carried by the multi-rotor unmanned plane can work or wait orders at the high places for a long time. The multi-rotor unmanned plane can be widely applied to fields including aerial site-specific surveillance, monitoring, photographing, live broadcast, environment monitoring, cast reconnoitre, urban management, courtyard security and protection, vehicle anti-theft and express delivery.
Owner:周良勇
Push-lean type rotary steering drilling system
ActiveCN111677445ARealize power transmissionSimple internal structureDirectional drillingAutomatic control for drillingRotational axisGear wheel
The invention discloses a push-lean type rotary steering drilling system comprising a drill bit, a rotary shaft, a turning part, a push-lean assembly, a transmission and a control unit. The rotary shaft comprises an upper rotary shaft and a lower rotary shaft. The turning part is arranged on the outer side of the rotary shaft in a sleeving mode. The push-lean assembly comprises a plurality of push-lean parts arranged at intervals in the circumferential direction of the turning part. The transmission device comprises a transmission mechanism driving the push-lean parts to stretch out of the turning part. The transmission mechanism comprises a driving electromagnetic gear arranged on the upper rotary shaft, and a driven electromagnetic gear arranged on the turning part. A motion conversionunit is further included and converts rotary motion of the driven electromagnetic gear into liner motion of the push-lean parts. The control unit is used for modulating a magnetic field, so that the driving and driven electromagnetic gears achieve linkage through magnetic coupling and operate with an adjustable transmission ratio. According to the push-lean type rotary steering drilling system, circuits elements, conductive sockets and the like do not need to be arranged on the turning part, the structure of the turning part is simplified, the size of the turning part is reduced effectively, flexibility of underground feed motion is improved, and cost is lowered.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Multi-rotor unmanned aerial vehicle
InactiveCN108622388AStable postureStable positionAircraft componentsRotocraftHigh riseUrban management
The invention relates to a multi-rotor unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a vehicle body, enginearms, motors, rotors and a foot stool, wherein one ends of the engine arms are connected to the machine body, the motors are arranged on the engine arms, the rotors are arranged on rotating shafts ofthe motors, the foot stool is connected under the machine body, in addition, horizontal pipes are further arranged on the foot stool, telescopic hanging racks are arranged in the horizontal pipes andare inverted L-shaped or J-shaped, and locking devices used for locking the hanging racks are further arranged on the horizontal pipes. The multi-rotor unmanned aerial vehicle can be hung an object on high such as an enclosing wall of a high-rise rooftop, an advertising board, a traffic sign board, an aerial electric wire and branches in a propped or lifted mode through the hanging racks; and after being hung on the object on high in a propped or lifted mode, the multi-rotor unmanned aerial vehicle does not need to be provided with lift force by electric energy of a battery, and working equipment of the multi-rotor unmanned aerial vehicle can work or stand by on high for a long time. The multi-rotor unmanned aerial vehicle can be widely applied to the fields of aerial fixed-point shooting, monitoring, living broadcasting, environmental protection monitoring, case reconnoitre, urban management, courtyard security and protection, vehicle anti-theft and the like.
Owner:周良勇
Cylindrical diaphragm
ActiveCN113247311AMeet the installation space requirementsImprove regularityCosmonautic vehiclesCosmonautic propulsion system apparatusFlight vehicleMechanical engineering
The invention relates to a liquid propellant extrusion-isolation device of an aircraft power system, and discloses a cylindrical diaphragm which comprises a diaphragm barrel, an inflation connector and an assembly connector. The diaphragm cylinder is composed of a cylinder body, a first end socket and a second end socket which are in seamless connection, and an inner cavity formed by the inner surface of the diaphragm cylinder is used for being filled with pressurized gas. The gas charging connector is connected with the first end socket of the diaphragm cylinder at the polar hole, is communicated with the inner cavity of the diaphragm cylinder and is used for assembling the diaphragm and charging and discharging gas; and the assembly joint is connected with the second end socket of the diaphragm cylinder at the polar hole and is used for assembling the diaphragm. The problems that a metal diaphragm cannot achieve a cylindrical structure, and several existing cylindrical extrusion-isolation devices are large in deformation randomness, poor in sealing performance, large in weight and the like are solved, and the cylindrical diaphragm the beneficial effects of being wide in application range, high in reliability, good in safety and the like are achieved.
Owner:SHANGHAI INST OF SPACE PROPULSION
Self-pressurizing fuel tanks for space propulsion
ActiveCN109455313BSimple structureSimple working processCosmonautic vehiclesCosmonautic propulsion system apparatusMarine engineeringFuel tank
Owner:HEBEI UNIV OF TECH
Integrated structure of rigidized inflatable deployable truss type planar antenna and solar array
ActiveCN102437404BSmall emission volumeEasy to launchPhotovoltaic supportsCollapsable antennas meansAttitude controlComputer module
The invention provides an integrated structure of a rigidized inflatable deployable truss type planar antenna and a solar array. A substrate of the solar array provided by the invention is arranged at the upper side of a truss structure; a solar cell slice is fixed on the upper surface of the solar array; a planar antenna module is arranged at the lower side of the truss structure to form the planar antenna; and a satellite or a space station is arranged at the middle part or the end part of the truss structure. In the invention, a rigidized inflatable deployable truss is used as the main body of the integrated structure; the truss can be flexibly folded during launching, is high in folding efficiency, small in launching volume and convenient for the traditional launching technology and launching equipment to launch large-aperture antennae and large-area solar arrays; after the launched large-aperture antennae and large-area solar arrays enter tracks, the integrated structure is unfolded and rigidized, is higher in structural rigidity and fundamental vibrational frequency and is beneficial to the posture control and the stable running on tracks of aircrafts such as the satellite and the like, the remarkable improvement of anti-vibration performance of the planar antenna and the improvement of precision and sensitivity of signals.
Owner:北京捭阖经纬创新科技有限公司
A Closed-loop Guidance Method for Off-orbit Braking Satisfied with Re-entry Angle and Range Constraints
ActiveCN105573337BHigh control precisionSmall amount of calculationPosition/course control in three dimensionsRobustificationWork period
Owner:NAT UNIV OF DEFENSE TECH
Carrier rocket attitude control method, device and equipment and storage medium
ActiveCN114253282AGood posture controlMeet separation security requirementsAttitude controlPosition/course control in three dimensionsAttitude controlAngular velocity
The invention discloses a carrier rocket attitude control method, device and equipment and a storage medium, and the method comprises the steps: determining whether a carrier rocket is in a separation prediction control state, the separation prediction control state comprises a contact sub-state and a separation sub-state, and when the carrier rocket enters the separation sub-state from the contact sub-state, determining whether the carrier rocket is in the separation prediction control state; the carrier rocket is separated into a residual body and a separated body; determining the total detachment duration when the carrier rocket is in the detachment sub-state; when the carrier rocket is in the separation sub-state, control instructions are sequentially sent to the remaining body in the first to (N-1) th control periods of the separation sub-state, and the control instructions are used for controlling the attitude angle and the attitude angular speed of the remaining body to reach set values in the next control period. The attitude control method not only can meet the separation safety requirement of the carrier rocket, but also can achieve the purpose of optimizing attitude control.
Owner:AEROSPACE SCI & IND KET TECH CO LTD
Multi-rotor unmanned aerial vehicle
InactiveCN106976554AStable postureStable positionAircraft componentsRotocraftElectrical batteryFlight vehicle
The invention provides a multi-rotor unmanned aerial vehicle and belongs to the technical field of unmanned aerial vehicles. The multi-rotor unmanned aerial vehicle comprises a fuselage, motors, rotors and foot frames. The motors are installed on the periphery of the fuselage. The rotors are connected to rotating shafts of the motors. The foot frames are arranged under the fuselage. In addition, transverse or longitudinal hanging rods are further arranged on the two sides of the fuselage or rotor protection frames. One ends of the hanging rods are provided with hooks, and the other ends of the hanging rods extend out of the rotor protection frames or the outsides of the rotor rotation ranges. The multi-rotor unmanned aerial vehicle can be hung or inserted into high objects to work through the hanging rods connected to the two sides of the fuselage or the rotor protection frames. The lifting force does not need to be provided by electric energy of a battery for the multi-rotor unmanned aerial vehicle in a hung or inserted state, and the working time of airborne working equipment in the one-time take-off and landing process can be greatly prolonged. The multi-rotor unmanned aerial vehicle can be widely applied in the fields of aerial fixed-point surveillance, monitoring, shooting, live broadcasting, environmental protection monitoring, field scientific investigation, case reconnoitering, city management, courtyard security and protection, vehicle theft prevention, express delivery and the like.
Owner:周良勇
Tether length correction method and system in tether releasing process
PendingCN113935148AEasy to controlRealize passive adjustmentCosmonautic vehiclesDesign optimisation/simulationClassical mechanicsControl theory
The invention discloses a tether length correction method and system in a tether release process. The method comprises the following steps: dividing the whole tether release process of a tethered satellite system into three stages: an acceleration stage, a constant speed stage and a deceleration stage; determining the tether speed fluctuation quantity and the tether length fluctuation quantity; judging whether the tether length fluctuation quantity meets a preset condition or not; and according to a judgment result of the tether length fluctuation quantity and a preset condition, selecting the tether speed fluctuation quantity or the tether length fluctuation quantity, and correcting the expected release time of the constant-speed section in combination with the sampling lengths of the acceleration section and the deceleration section to obtain the actual release time of the constant-speed section. The expected release length of the acceleration section is compared with the actual release length, the possible actual release length of the deceleration section is estimated in advance, the tether length deviation generated by the acceleration section and the deceleration section is corrected at the constant speed section, passive adjustment of the release length of the tether is achieved, a series of problems caused by re-adjusting the release speed of the tether after the tether is released in place are avoided, and rope length control in the release process is simplified.
Owner:BEIJING INST OF CONTROL ENG
Test bench for testing flight performance of small-sized helicopter
InactiveCN100368789CGuaranteed free flightEnsure safetyCosmonautic condition simulationsStructural/machines measurementTest performanceAttitude control
Owner:ZHEJIANG UNIV
A Design Method of Variable Structure Synthetic Controller for Reducing Auv Roll and Pitch
ActiveCN110456809BGood for attitude controlTo achieve the effect of comprehensive anti-rollingAttitude controlMode controlControl system
The invention belongs to the field of navigation control of underwater vehicles, and in particular relates to a design method of a variable structure integrated controller for reducing the roll and pitch of an AUV. The horizontal rudder based on the working principle of the zero-speed fin stabilizer can realize the active anti-rolling of the roll and pitch motions when sailing at low speed. And considering the six-degree-of-freedom nonlinearity and coupled motion of the underwater vehicle and the working principle of the horizontal rudder, an improved variable structure controller is designed to further improve the approaching speed of the approaching process in the sliding mode control and eliminate the slippage. The chattering phenomenon of the mode control system can be greatly reduced by the improved sliding mode integrated controller under different wave disturbances. The analysis of the simulation results shows that the present invention can effectively reduce the rolling and pitching motion of the underwater vehicle.
Owner:HARBIN ENG UNIV
Three-dimensional object absolute attitude control method and device based on fingerprint image
PendingCN114356102AGood for attitude controlInput/output for user-computer interactionCharacter and pattern recognitionThree-dimensional spaceAttitude control
The invention provides a three-dimensional object absolute attitude control method and device based on a fingerprint image, and the method comprises the steps: collecting a fingerprint image of a current finger in real time; speculating the three-dimensional posture of the current finger according to the sequence image; mapping the three-dimensional posture of the current finger into a three-dimensional input signal, and controlling the absolute posture of the target object in the three-dimensional space according to the three-dimensional input signal; and taking the absolute attitude obtained after control as a target attitude, and calculating a conversion path for converting the controlled object to the target attitude. According to the three-dimensional absolute attitude control method, the existing man-machine interaction mode can be effectively expanded, and convenience is provided for object attitude control in a three-dimensional space.
Owner:TSINGHUA UNIV
diaphragm tank
ActiveCN112389682BImprove expansion deformationImprove regularityCosmonautic vehiclesCosmonautic propulsion system apparatusLiquid mediumFlight vehicle
Owner:SHANGHAI INST OF SPACE PROPULSION
Multi-rotor-wing unmanned aerial vehicle
InactiveCN107117306AStable postureStable positionAircraft componentsRotocraftFlight vehicleElectrical battery
The invention provides a multi-rotor-wing unmanned aerial vehicle and belongs to the technical field of unmanned aerial vehicles. The multi-rotor-wing unmanned aerial vehicle comprises a vehicle body, motors, rotor wings and a foot stand, the motors are mounted on the periphery of the vehicle body, the rotor wings are connected to rotary shafts of the motors, and the foot stand is arranged on the lower portion of the vehicle body. The multi-rotor-wing unmanned aerial vehicle is characterized in that hanging rods are further arranged on the two sides of the vehicle body or on rotor-wing protective frames, one ends of the hanging rods are provided with hooks, magnets are arranged at the other ends of the hanging rods, and the multi-rotor-wing unmanned aerial vehicle can be hung at an object of a high position for working through the hooks on the hanging rods or attraction force of the magnets. The multi-rotor-wing unmanned aerial vehicle which is in a hanging state does not need battery electric energy for providing of lift force, and the work time of airborne work equipment can be greatly prolonged in the one-time taking-off and landing process. The multi-rotor-wing unmanned aerial vehicle can be widely applied to the fields of aerial fixed-point surveillance, monitoring, shooting, live broadcasting, environmental protection monitoring, field science investigation, case scout, city management, courtyard security and protection, vehicle burglary prevention, express delivery and the like.
Owner:周良勇
A Push-Back Rotary Steerable Drilling System
ActiveCN111677445BRealize power transmissionSimple internal structureDirectional drillingAutomatic control for drillingRotational axisGear wheel
The present application discloses a push-on type rotary steerable drilling system, which includes a drill bit and a rotating shaft. The rotating shaft includes an upper rotating shaft and a lower rotating shaft; a steering part is sleeved outside the rotating shaft; A plurality of pushing parts arranged at intervals in the circumferential direction; a transmission device, including a transmission mechanism that drives the pushing parts to extend out of the steering part; the transmission mechanism includes a driving electromagnetic gear arranged on the upper rotating shaft and a driven electromagnetic gear arranged on the steering part; It also includes a motion conversion unit, which converts the rotational motion of the driven electromagnetic gear into the linear motion of the pusher; and a control unit, which is used to modulate the magnetic field to achieve linkage between the main and driven electromagnetic gears through magnetic coupling, and to make the main and slave The moving electromagnetic gear operates with an adjustable transmission ratio. The system in this application does not need to install circuit components and conductive sockets on the steering part, simplifies the structure of the steering part, effectively reduces the size of the steering part, improves the flexibility of the downhole feeding movement, and reduces costs.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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