公开(公告)号：US12253049B2

公开(公告)日：2025-03-18

申请号：US18556356

申请日：2022-03-21

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS ,  BEIJING AEROSPACE TECHNOLOGY INSTITUTE

Inventor： Hexia Huang ,  Zhengkang Lin ,  Xuebin Tang ,  Yuan Qin ,  Huijun Tan ,  Hang Zhang ,  Ziren Wang ,  Chao Li ,  Xiru Xu

IPC: F02K7/10 ,  B64D33/02 ,  F02C7/042

Abstract: The present invention provides a hypersonic large internal contraction ratio air inlet channel having stepless adjustable air release valve, including an air inlet channel front body, an air-discharging slit cover plate, sidewalls, a lip cover, air-discharging cavities, valve plates, partition plates, a rotatable shaft, an expansion section and a driver. The valve plates are rotated through the driver according to the actual working conditions of air inlet channel, the minimum cross-section of the air discharging flow path is thus changed, and a stepless dynamic adjustment of the air discharging flow of the air inlet channel can be realized, so that the aerodynamic performance of the air inlet channel is improved, and the air discharging resistance of the air vehicle is reduced.

公开(公告)号：US12123349B2

公开(公告)日：2024-10-22

申请号：US17784671

申请日：2020-08-26

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

Inventor： Yue Zhang ,  Huijun Tan ,  Chao Wang ,  Chao Li ,  Liang Chen

IPC: B64D33/02 ,  F02C7/042 ,  F02C7/057

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.

公开(公告)号：US11830164B2

公开(公告)日：2023-11-28

申请号：US18316317

申请日：2023-05-12

Applicant: Nanjing University of Aeronautics and Astronautics

Inventor： Jun Wang ,  Zhongde Shan ,  Kaijun Zhang ,  Zikuan Li ,  Chao Li

IPC: G06T3/40

CPC classification number: G06T3/4046

Abstract: This application discloses a semantic learning-based down-sampling method of point cloud data of an aircraft, including: (S1) constructing a multi-input encoder based on feature learning according to point cloud semantic learning principle; inputting the point cloud data of the aircraft and feature point data into the multi-input encoder for feature fusion followed by decoding using a decoder the multi-input feature fused data to obtain to-be-measured data; (S2) constructing and training a point cloud feature weight calculation network based on semantic learning to acquire a feature weight of each point in the to-be-measured data; and (S3) performing spatial weighted sampling on the feature weight of each point in the to-be-measured data followed by down-sampling based on Gaussian distribution-based spatial sampling principle.

公开(公告)号：US11661686B2

公开(公告)日：2023-05-30

申请号：US17702145

申请日：2022-03-23

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

Inventor： Zhongde Shan ,  Jun Wang ,  Yaoyao Wang ,  Haoqin Yang ,  Chao Li

IPC: D04C3/48 ,  D04C3/40

CPC classification number: D04C3/48 ,  D04C3/40

Abstract: A mechanism for radially inserting a yarn into a 3D braided preform, including a first bracket, an upper linear actuator, a support mechanism, an upper yarn insertion device, a yarn carrying device, an upper gear ring, a lower yarn insertion device, a lower linear actuator, a second bracket, a lower gear ring, a lower gear, a lower motor, a lower circular track, an upper circular track, a base, an upper gear, a pneumatic transmission and control device and an upper motor.