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公开(公告)号：US20210331191A1
公开(公告)日：2021-10-28
申请号：US17169538
申请日：2021-02-07
发明人： Jun WANG , Jun ZHOU , Yuanpeng LIU , Qian XIE
摘要： A method for automatic glue-spraying of stringers and inspection of glue-spraying quality based on measured data. Three-dimensional (3D) point cloud data of a stringer-skin assembly is collected by 3D laser scanner, and then processed by denoising and sampling. Feature points of an intersection line of a site to be glued of the stringer-skin assembly are extracted by K-means clustering method based on Gaussian mapping, and a minimum spanning tree is constructed based on a set of the extracted feature points. A connected region is established to obtain an initial feature intersection line of the string-skin assembly, which is optimized by random sample consensus algorithm to remove redundant small branch structures to obtain the actual glue-spraying trajectory. The quality of the glue sprayed on the stringer-skin assembly is inspected by line laser to determine positions of the defects, which are then subjected to secondary glue-spraying.
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公开(公告)号：US20210269087A1
公开(公告)日：2021-09-02
申请号：US17258378
申请日：2019-11-06
发明人： Wanzhong ZHAO , An WANG , Xiaochuan ZHOU , Chunyan WANG , Lijuan CHEN
摘要： An active fault tolerance and fault mitigation system based on steer-by-wire dual motors and a mode switching control method thereof are provided. The system includes an acquisition unit, a steering wheel assembly, an ECU control module, a front wheel steering assembly, and a fault tolerance controller (18) which are sequentially connected. The acquisition unit transmits an acquired vehicle signal to the ECU control module, and then a corresponding compensation strategy is selected by means of a fault tolerance control strategy unit, a yaw rate calculation unit, a stability control unit, and a dual-motor compensation unit to act on a rack and pinion mechanism (15). The system and method can perform switching in an active fault tolerance and fault mitigation mode to achieve optimal control of the real-time performance of a vehicle, thereby ensuring the driving performance and higher performance of the vehicle in a field fault condition.
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公开(公告)号：US20210261405A1
公开(公告)日：2021-08-26
申请号：US17288536
申请日：2020-06-11
申请人： Nanjing University of Aeronautics and Astronautics , Nanjing Li-Hang Industry Institute of Bionic Technology Limited Company
发明人： Zhendong DAI , Keju JI , Enhua CUI , Jian CHEN , Cong YUAN , Yiqiang TANG
IPC分类号： B81C1/00 , C09J183/04 , C09J133/08 , C09J109/00 , B81B1/00 , B81C99/00 , B29C33/38 , C25D7/00
摘要： A preparation method of a bionic adhesive material with a tip-expanded microstructural array includes the following steps: machining through-holes on a metal sheet; modifying morphology of a through-hole by electroplating, using the metal sheet in step 1 as an electroplating cathode, and arranging the electroplating cathode and an electroplating anode in parallel to prepare a hyperboloid-like through-hole array assembly, fitting a lower surface of the hyperboloid-like through-hole array assembly tightly to an upper surface of a substrate assembly to prepare a through-hole assembly of a mold; and filling the mold assembly with a polymer, curing, and demolding to obtain the adhesive material with the tip-expanded microstructural array.
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44.发明申请公开(公告)号：US20210255645A1
公开(公告)日：2021-08-19
申请号：US17274445
申请日：2020-07-28
发明人： Rong WANG , Zhi XIONG , Jianye LIU , Rongbing LI , Chuanyi LI , Junnan DU , Xin CHEN , Yao ZHAO , Yuchen CUI , Jingke AN , Tingyu NIE
摘要： Disclosed is an online dynamic mutual-observation modeling method for unmanned aerial vehicle (UAV) swarm collaborative navigation, which includes: first performing first-level screening for members according to the number of usable satellites received by a satellite navigation receiver of each member, to determine the role of each member in collaborative navigation at the current time, and then establishing a moving coordinate system with each object member to be assisted as the origin, and calculating coordinates of each candidate reference node; and on this basis, performing second-level screening for the candidate reference nodes according to whether mutual distance measurement can be performed with each object member, to obtain a usable reference member set, and preliminarily establishing a dynamic mutual-observation model; and finally, optimizing the model by means of iterative correction, and conducting a new round of dynamic mutual-observation modeling according to an observation relationship in the UAV swarm, its own positioning performance, and role change in collaborative navigation, thus providing an accurate basis for effectively realizing UAV swarm collaborative navigation.
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公开(公告)号：US20210174171A1
公开(公告)日：2021-06-10
申请号：US17255267
申请日：2020-02-18
发明人： Dechang Pi , Junfu Chen , Zhiyuan Wu
摘要： The present disclosure provides a satellite anomaly detection method and system for an adversarial network auto-encoder. The method includes: obtaining a variational auto-encoder and a generative adversarial network; adding the generative adversarial network to the variational auto-encoder, and determining an optimized variational auto-encoder; obtaining to-be-detected satellite telemetry data; and determining a current operating status of a satellite based on the to-be-detected satellite telemetry data by using the optimized variational auto-encoder, where the current operating status includes a normal operating state or an abnormal operating state. The satellite anomaly detection method and system for an adversarial network according to the present disclosure solve the low accuracy problem of automatic satellite anomaly detection in the prior art.
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公开(公告)号：US10885390B2
公开(公告)日：2021-01-05
申请号：US16353754
申请日：2019-03-14
申请人： Nanjing University of Aeronautics and Astronautics , Tencent Technology (Shenzhen) Company Limited
发明人： Shengjun Huang , Nengneng Gao , Kun Yuan , Wei Chen , Di Wang
摘要： A sample selection method and apparatus and a server belong to the field of metric learning technologies. The method includes: selecting n sample pairs from an unlabeled sample set, each sample pair including two samples, and each sample including data in p modalities; calculating a partial similarity between data that is in each modality and that is of one sample included in the sample pair and data that is in each modality and that is of the other sample, to obtain p×p partial similarities; calculating, according to the p×p partial similarities, an overall similarity between the two samples included in the sample pair; obtaining a degree of difference between the p×p partial similarities and the overall similarity; and selecting a sample pair that meets a preset condition and that is in the n sample pairs as a training sample. In this application, training samples of high quality are selected to train a metric model, so that the metric model of higher precision can be trained by using fewer training samples.
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公开(公告)号：US20200339280A1
公开(公告)日：2020-10-29
申请号：US16960326
申请日：2019-11-30
发明人： Xiaohui WEI , Tianchi GAO , Zhao ZHANG , Hong NIE , Jingqi HUANG
摘要： An apparatus and method for continuous catapulting of unmanned aerial vehicles are disclosed, and relate to the technical field of aircraft catapulting and recovery. The apparatus consists of an unmanned aerial vehicle storage apparatus, an unmanned aerial vehicle conveying apparatus, an automatic unmanned aerial vehicle loading apparatus, tackles and a rotary tube-type multi-track unmanned aerial vehicle catapult. The present invention can increase catapulting efficiency of the unmanned aerial vehicles, and is suitable for rapidly forming a cluster of the unmanned aerial vehicles.
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公开(公告)号：US10697937B2
公开(公告)日：2020-06-30
申请号：US16346126
申请日：2017-12-19
发明人： Shenfang Yuan , Qiao Bao , Lei Qiu , Fangyu Guo , Yuanqiang Ren
摘要： The present invention discloses a Multiple Signal Classification (MUSIC) corrosion monitoring method via excitation beam forming and weighted image fusing. Because damage-related scattering signals are weak and precision of the MUSIC algorithm is affected, the present invention first introduces excitation beam forming and two arrays into the MUSIC method, to enhance scattering signals of corrosive damage and improve their signal-to-noise ratios. Then, the two arrays serve as an excitation array or a sensor array in turn, by assigning weight to fused corrosive damage images of the two arrays, monitoring of corrosive damage in blind zones of the one-dimensional linear arrays is realized. Finally, factors related to the corrosive damage are calculated based on eigenvalues of covariance matrixes of array signals, to determine the depth of the corrosive damage. The present invention improves the positioning precision in the MUSIC corrosion monitoring, widens a monitoring range of the conventional one-dimensional linear array, and realizes evaluation of the depth of the corrosive damage, thus has wide application prospects in actual monitoring of corrosive damage in an aviation structure.
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公开(公告)号：US10663437B2
公开(公告)日：2020-05-26
申请号：US16345713
申请日：2017-12-29
发明人： Jian Cai , Shenfang Yuan
摘要： An improved domain transformation method for a dispersive ultrasonic guided wave signal, including the following steps: obtaining a dispersive wave number curve and a non-dispersive wave number curve corresponding to a mode of an ultrasonic guided wave signal; calculating an ultrasonic guided wave excitation waveform that is in distance domain and that has a reduced space width; obtaining an ultrasonic guided wave impulse response signal in distance domain; and calculating and obtaining a non-dispersive ultrasonic guided wave distance-domain signal whose resolution is enhanced.
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公开(公告)号：US10205518B1
公开(公告)日：2019-02-12
申请号：US15854712
申请日：2017-12-26
发明人： Min Xue , Shilong Pan , Ting Qing , Shupeng Li , Yuqing Heng
IPC分类号： H04B10/07 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/077
摘要： An apparatus comprises an optical detecting signal generator configured to provide an optical spectrum comprising two frequency carriers, the two frequency carriers having two different nominal carrier frequencies, and the output port of the optical detecting signal generator being further configured to be coupled to a device under test (DUT); an optical to electrical converter configured to generate a first electrical current based on the optical spectrum without the optical spectrum passing through the DUT; and generate a second electrical current based on the optical spectrum after the optical spectrum passes through the DUT; and a data processor coupled to the optical to electrical converter, the data processor being configured to determine a transfer function of the DUT at an average of the two different nominal carrier frequencies based on the first electrical current and the second electrical current.
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