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公开(公告)号：US11658523B2
公开(公告)日：2023-05-23
申请号：US17281490
申请日：2019-11-06
Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS , QINHUAI INNOVATION INSTITUTE OF NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS
Inventor： Li Yu , Zhuoran Zhang , Yuke Shi , Linnan Sun , Xu Chen
Abstract: A consequent-pole permanent magnet biased bearingless doubly-salient motor includes: a core of a stator/rotor, a middle part of a surface, facing an air gap (11), of each stator pole 1-1 is grooved toward an edge part of the stator pole 1-1 in an anti-clockwise direction, one permanent magnet is attached in each groove, and a surface, facing the air gap (11), of each permanent magnet (3) is the same in polarity; each stator pole 1-1 is wounded with an armature coil, the armature coils are serially connected in sequence to form an armature winding, and the armature winding is respectively connected to an external main circuit; and every three stator poles 1-1 are wound with a suspension coil, and the suspension coils opposite spatially and radially are serially connected to form a suspension winding connected to an external suspension control circuit.
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公开(公告)号：US20250018485A1
公开(公告)日：2025-01-16
申请号：US18221622
申请日：2023-07-13
Inventor： Dengyong WANG , Shuofang ZHOU , Di ZHU , Wenjian CAO , Jun ZHANG , Zengwei ZHU
IPC: B23H3/04
Abstract: A revolving cathode tool and method for co-rotating electrochemical machining of an inner wall of an aero-engine casing are provided, and relates to the technical field of electrochemical machining. The co-rotating electrochemical machining revolving cathode tool comprises a power supply, a cathode shaft, an anode workpiece and a flexible cathode assembly. The cathode shaft is electrically connected with a cathode of the power supply. The anode workpiece is electrically connected with an anode of the power supply. One end of the cathode shaft is connected with the flexible cathode assembly. The problem that a non-array complex structure of the inner wall of the aero-engine casing cannot be machined through counter-rotating electrochemical machining is fundamentally solved. The diameter of the cathode tool is 1/n of the diameter of the anode workpiece.
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公开(公告)号：US12195102B2
公开(公告)日：2025-01-14
申请号：US17636006
申请日：2020-05-14
Inventor： Wanzhong Zhao , Zhongkai Luan , Xiaochuan Zhou , Chunyan Wang
Abstract: An electric truck steer-by-wire system and a net-work uncertainty control method therefor. Said system comprises: a master control electric power module (14), a slave control electric power module (18), a road-sensing motor module (4), a steering wheel (1), an upper steering column (3), a lower steering column (10), a rack and pinion steering mechanism (12), wheels (13), a first steering angle sensor (2), a second steering angle sensor (11), a steering domain controller (8), and a vehicle-mounted CAN network (9). By means of the design of the master and slave controllers and actuating mechanisms, the system combines the advantages of steering angle tracking, torque tracking and current tracking, there-by satisfying the steering response requirements and power requirements of the electric truck, and further enhancing the robustness and fault-tolerant performance of the system under a random network time lag.
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公开(公告)号：US12186970B2
公开(公告)日：2025-01-07
申请号：US18776250
申请日：2024-07-18
Inventor： Jinghua Zheng , Yiwei Chen , Congze Fan , Wenzhe Song , Yaxing Song , Zhongde Shan
Abstract: A multi-arm forming device for space on-orbit composite braiding is provided. Through the rotary movement of a combination of circularly arranged mechanical arm-type laying apparatuses relative to a mold, a plurality of hot press laying heads are controlled together to implement high-efficiency and high-freedom winding and braiding formation of a composite member. The retraction and expansion deformation of the gasbag mold is achieved by inflating and deflating based on design, and the overall device is lightened by switching its structural volume in an operating/non-operating state, thereby achieving the purpose of facilitating the lift-off of rockets and the demolding, repair and weight reduction of winding and braiding structural members for operation in space. Additionally, gas in a gasbag can be used as emergency kinetic energy for the movement and attitude adjustment of the overall device in space. High-quality and efficient winding and braiding formation of composites in space are achieved ultimately.
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公开(公告)号：US20250003755A1
公开(公告)日：2025-01-02
申请号：US18278650
申请日：2022-07-07
Inventor： Hua XIE , Yongwen ZHU , Fangzheng SU , Jianan YIN , Ligang YUAN , Lei YANG , Zhao YANG , Jie BAO , Zhili TANG , Changchun WANG , Fan PU
Abstract: The present invention provides a method and an apparatus for detecting unmanned aerial vehicle conflict based on an airspace digital raster, and a storage medium, wherein the method comprises: establishing an airspace discrete subdivision raster model; constructing a conversion relationship between a raster code rule and longitude and latitude coordinates and grid codes; establishing an unmanned aerial vehicle safety protection area, and performing gridding expression on the unmanned aerial vehicle in the airspace; establishing a coordinate system to convert the grid codes of the unmanned aerial vehicle into coordinates; calculating the Minkowski difference set of two blocks using the GJK algorithm; and determining whether the unmanned aerial vehicle conflicts or not according to the Minkowski difference set. Through combining an airspace raster code and the GJK algorithm, compare with traditional coordinate operation in pairs, the present invention can effectively reduce the complexity of conflict detection, save a lot of calculation time, and effectively improve the efficiency of detecting unmanned aerial vehicle conflict to meet the rapid and real-time conflict detection requirements of unmanned aerial vehicles in the airspace.
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Patent Agency Ranking
公开(公告)号：US12134221B1
公开(公告)日：2024-11-05
申请号：US18777503
申请日：2024-07-18
Inventor： Wenzhe Song , Congze Fan , Jinghua Zheng , Yiwei Chen , Jingxuan Wang , Zhongde Shan
IPC: B29C48/05 , B29B15/14 , B29C48/28 , B29C48/88 , B29C48/885 , B29C64/314 , B29C70/52 , B29K105/08 , B29K307/04 , B33Y40/10 , B33Y70/10 , B29K71/00
Abstract: An on-orbit composite filament forming device for space 3D printing includes a constant tension unwinding module, a replaceable resin filament rotary wrapping module, a melt preheating chamber, a curved channel impregnation chamber, a variable aperture resin recovery device, a heat protective housing, a convective cooling device, a traction device, and a winding device. The replaceable resin filament rotary wrapping module wraps a resin filament on a surface of a carbon fiber by circumferential rotation and is provided with an active unwinding reel placed on a circular rail centered on the carbon fiber; the melt preheating chamber is used for melting resin to wrap the surface of the fiber, and is equipped with a lifting device for automatic opening and closing; the curved channel impregnation chamber is formed with a wedge-shaped high-pressure impregnation zone by mutual extrusion of upper and lower pressure blocks, thereby improving the quality of fiber impregnation.
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公开(公告)号：US12128474B2
公开(公告)日：2024-10-29
申请号：US18037783
申请日：2022-09-05
Inventor： Haoqin Yang , Zhongde Shan , Qinjiang Liu , Jianpei Shi , Dandan Yan , Shijie Dong
Abstract: A method for preparing a negative pressure film-covering frozen sand mold includes: directly obtaining a mold cavity of a sand mold through numerically controlled machining of a frozen sand blank; covering a surface, brushed with a thermal insulation coating, of the mold cavity of the sand mold with a softened thin film, and covering an outer surface of the sand mold with a back film to seal a sand box; fixing the frozen sand mold in an air extraction sand box with a vacuum chamber, and extracting air through a vacuum pump, so that the thin film tightly adheres to the sand mold through vacuum suction force; and closing the box to obtain an integral sand mold, and pouring a casting at room temperature or low temperature under negative pressure. The method is environment-friendly, and the prepared frozen sand mold has high strength and is convenient for sand cleaning.
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公开(公告)号：US12123349B2
公开(公告)日：2024-10-22
申请号：US17784671
申请日：2020-08-26
Inventor： Yue Zhang , Huijun Tan , Chao Wang , Chao Li , Liang Chen
CPC classification number: F02C7/042 , B64D33/02 , F02C7/057 , B64D2033/026 , Y10T137/0536
Abstract: The present invention discloses an internal-parallel inlet with mode conversion combined with variable geometry adjustment, which comprises a high-speed channel, a low-speed channel, a mode conversion component, a variable geometry component and a motor actuating component. When the inlet is in a low-speed mode, the variable geometry component adjusts the throat area and the internal contraction ratio of the inlet. When the flight Mach number is in a range of the mode conversion Mach number, the mode conversion component and the variable geometry component work simultaneously. When the inlet is in a high-speed mode, the mode conversion component is combined with the variable geometry component to adjust the throat area and the internal contraction ratio of the inlet. The present invention also provides a method for controlling the inlet.
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9.发明授权公开(公告)号：US12122538B2
公开(公告)日：2024-10-22
申请号：US17632575
申请日：2021-03-10
Inventor： Shan Jia , Jianhua Zhao , Jinbao Chen , Xianghua Zhou , Sheng Zhang
IPC: B64G1/24 , B01D21/28 , B64G1/10 , B64G1/36 , B64G1/64 , G01H3/00 , G01M1/22 , G01M3/24 , G01V1/00
CPC classification number: B64G1/244 , B01D21/283 , B64G1/105 , B64G1/36 , B64G1/64 , G01H3/00 , G01M1/22 , G01M3/243 , G01V1/001 , B64G1/1071
Abstract: A suspending release device for observing a drop vibration attitude change of a lander and a test method are provided. The device includes a bench system, a lifting system fixed to the bench system, a horizontal frame system, an attitude control system, and a suspending release system hinged to the attitude control system. The horizontal frame system may slide vertically on the bench system and may drive the attitude control system to slide horizontally. A test lander is fixed to a release sliding block. The release sliding block is locked with a main load bearing block. An attitude of the test lander when releasing is adjusted. The horizontal frame system is lifted to a predetermined height. Guide rods are indirectly driven to release the sliding block by a motor. The whole lander falls freely and touches the ground to collide, and the process is recorded by a high-speed camera.
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公开(公告)号：US20240270379A1
公开(公告)日：2024-08-15
申请号：US18430816
申请日：2024-02-02
Inventor： Zhe Chen , Xu Zhou , Qijun Zhao , Zhuangzhuang Cui , Binwu Ren , Muyang Lin
IPC: B64C27/473
CPC classification number: B64C27/473 , B64C2027/4736
Abstract: The present disclosure provides a negative torsion variable paddle and a control assembly thereof. The paddle includes rigid first paddles and rigid second paddles. When a driver pushes a root railing edge, the first paddle is not flexibly deformed, and the second paddle is torsionally deformed with a laminated elastomer structure between cascades to realize relative rotation at both ends of the second paddle, so that a flexible skin maintains airfoil contours, and the whole torsional degree of the paddle is changed. The present disclosure also provides a rotor craft including the negative torsion variable paddle.
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