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International Conference on control and Automation (ICCA)

作者： Yiyang Chen Yongzhao Hua Zhi Feng Xiwang Dong School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory and Shenyuan Honors College Beihang University Beijing P. R. China Institute of Artificial Intelligence Beihang University Beijing P.R. China Science and Technology on Aircraft Control Laboratory Institute of Unmanned System Institute of Artificial Intelligence and School of Automation Science and Electrical Engineering Beihang University Beijing P.R. China

ISBN: (数字)9798350354409

ISBN: (纸本)9798350354416

This paper proposes a practical prescribed-time edge-based fully-distributed Nash equilibrium seeking algorithm where no global gain is utilized. In order to achieve practical prescribed-time convergence, the time base generator (TBG) is involved in the gradient descent part, the observation part and the parameter updating part of the algorithm. The update rates of the two types of adaptive parameters are coupled with the information of the edges of the communication graph. Besides, an exponential parameter is designed and the parameter increases more mildly by utilizing the TBG. A Lyapunov function is constructed to show the practical prescribed-time convergence property. The simulation results of an energy consumption game are provided to illustrate the effectiveness of the algorithm.

关键词： Energy consumption Automation Simulation Games Nash equilibrium Generators Convergence

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Anti-swing Coordinated control of the UAV Wing Folding During the Aerial Recovery Process

Anti-swing Coordinated Control of the UAV Wing Folding Durin...

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International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Liu, Yiheng Wang, Honglun Wang, Yanxiang Fan, Jiaxuan School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Beijing Institute of Astronautical System Engineering Beijing100076 China Shenyuan Honors College of Beihang University Beijing100191 China The Science and Technology On Aircraft Control Laboratory Beihang University Beijing100191 China Research and Development Center of China Academy of Launch Vehicle Technology Beijing100071 China

ISBN: (纸本)9789811966125

In the process of UAV aerial recovery, the UAV needs to fold its wings, which will lead to a sharp drop in the lift and cause the cable to sway. Aiming at this problem, an anti-swing coordinated control method of wing folding based on quadratic programming control allocation is proposed. It can make full use of the grid rudder of the drogue to compensate the lift lost caused by wing folding and use quadratic programming to allocate the rudder deflection angle that can not only satisfy the moment balance, but also satisfy the force balance, so as to realize the coordinated control of the drogue grid rudder and the UAV rudder surface. Simulations are conducted to verify the effectiveness of the proposed control method. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Unmanned aerial vehicles (UAV)

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Experimental study on airfoil flow separation control via an air-supplement plasma synthetic jet

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Advances in Aerodynamics 2022年第1期4卷 721-742页

作者： Ru-Bing Liu Wen-Tao Wei Hai-Peng Wan Qi Lin Fei Li Kun Tang School of Aerospace Engineering Xiamen UniversityXiamen361102China Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Xiamen361005China Chengdu Aircraft Design and Research Institute Chengdu610041China Shanghai Aerospace Control Technology Institute Shanghai201100China Rotor Aerodynamics Key Laboratory China Aerodynamics Research and Development CenterMianyang621000China Science and Technology on Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an710038China

An air-supplement plasma synthetic jet(PSJ)actuator increases the air supplemental volume in the recovery stage and improves the jet energy by attaching a check valve to the chamber of a conventional *** explore the flow control effect and mechanism of the air-supplement actuator,via particle image velocimetry experiments in a low-speed wind tunnel,the flow field and boundary layer characteristics of a two-dimensional airfoil surface under different actuation states were compared for different attack angles and jet *** experimental results show that,compared with the conventional actuation state,the jet energy of the air-supplement PSJ is higher and the indirect mixing effect of the counter-vortex sequence produced by the jet-mainstream interaction is ***,the boundary layer mixing effect is better,which can further suppress flow separation and improve the critical flow separation attack ***,increasing the jet momentum coefficient can enhance the flow control *** findings of this study could provide guidance for the flow control application of air-supplement PSJs.

关键词： Plasma synthetic jet Check valve Flow separation Active flow control Air-supplement

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Morphing aircraft Flight control Using Nonlinear Dynamic Inversion

Morphing Aircraft Flight Control Using Nonlinear Dynamic Inv...

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International Conference on Guidance, Navigation and control, ICGNC 2020

作者： Qiao, Fuxiang Guo, Lizhi Shi, Jingping School of Automation Northwestern Polytechnical University Xi’an710072 China AVIC Beijing KEEVEN Aviation Instrument Co. LTD Beijing100086 China Science and Technology on Aircraft Control Laboratory Xi’an710129 China

ISBN: (纸本)9789811581540

This paper focuses on flight controller design for the morphing aircraft which using the swept-back wing. In this paper, the nonlinear morphing aircraft is modeled and the longitudinal mathematical equations are extracted. And the nonlinear dynamic inversion (NDI) flight controller is designed for the longitudinal mathematical model. For solving the problem of dynamic inverse error caused by modeling error in flight control, the control law is improved by adding an additional feedback in the channel of nonlinear cancellation. And to a certain extent, the influence caused by interference forces and moments and non-linear cancellation errors are eliminated. Two simulation experiments are designed for the fixed and morphing configuration. The results of them show the NDI controller has a good performance of tracing and certain robustness for the morphing aircraft. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Errors

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Optimal matching based on singular value decomposition for star pattern recognition 8

Optimal matching based on singular value decomposition for s...

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8th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Liang, Jiang Shijie, An Yalei, Qi Shuizhong, Chen Shengwei, Zhang Science and Technology on Electro-Optical Control Laboratory Luoyang471009 China Luoyang Institute of Electro-Optical Equipment AVIC Luoyang471009 China Shenyang Aircraft Design and Research Institute AVIC Shenyang11000 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

For the purpose of improving the recognition rate and the anti-noise ability, a new star pattern recognition algorithm is proposed, which is based on optimal singular value decomposition matching. The algorithm can effectively solve the recognition failure caused by redundant matching results, which the triangle recognition algorithm and the pyramid algorithm can not. Compared with traditional star pattern recognition algorithms, the recognition rate and the anti-noise ability of the new algorithm proposed in this paper are improved. With the star position noise added (Gauss noise, mean=0, s=3pixel), the recognition rate is 98.91%, and the average recognition time assumption is 20.21ms. © 2022 SPIE

关键词： Singular value decomposition

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Research on Distributed Target Allocation in Multi-UAV Beyond Visual Range Cooperative Air Combat

Research on Distributed Target Allocation in Multi-UAV Beyon...

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International Conference on Guidance, Navigation and control, ICGNC 2020

作者： Li, Weihua Guo, Lizhi Shi, Jingping School of Automation Northwestern Polytechnical University Xi’an710072 China AVIC Beijing KEEVEN Aviation Instrument Co. LTD Beijing100086 China Science and Technology on Aircraft Control Laboratory Xi’an710129 China

ISBN: (纸本)9789811581540

In this paper, an improved consensus-based auction distributed target allocation method is proposed to solve the problem of target allocation in multi-UAV beyond visual range cooperative air combat. Firstly, by analyzing the impacts of air combat situation, the air combat target allocation model based on geometric situation is established. Then, by considering the cooperation of multiple UAVs and the coordination of multiple missiles from the same UAV, an improved asynchronous consensus-based auction algorithm is proposed, which can simultaneously indicate the indexes of targets and the number of missiles assigned to targets. The simulation results show that the algorithm can converge quickly in limited steps. Compared to the original algorithm, the algorithm has more reasonable allocation results and can improve the overall distribution score. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Missiles

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Distributed Robust Fixed-Time Dynamic Average Consensus Protocol for Networked Agents

Distributed Robust Fixed-Time Dynamic Average Consensus Prot...

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第42届中国控制会议

作者： Weihao Li Mengji Shi Zili Ren Jiangfeng Yue Boxian Lin Kaiyu Qin School of Aeronautics and Astronautics University of Electronic Science and Technology of China The Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province

This paper seeks a robust dynamic average consensus protocol that makes the networked agents reach a common timevarying average state of multiple reference signals within an advanced preset time. It can be applied in fields such as multi-robot map merging and DC microgrid secondary control. Finite-time dynamic average consensus algorithms are studied in existing papers, while the convergence time is dependent on the initial states of the agents, so larger differences among their initial states may result in a slower convergence rate. Hence, a robust fixed-time dynamic average consensus scheme is presented in this *** settling time of the proposed scheme only relies on the parameters of the protocol and is independent of the initial values of agents. Specifically, the theoretical fixed-time convergence analysis is achieved by adopting the Lyapunov function, which indicates that dynamic average consensus can be reached within a fixed-time interval. Moreover, a damping term is added to the internal dynamics of agents to enhance the robustness of the protocol once the network interaction is changed. Finally, some numerical simulations are shown to verify the effectiveness of the proposed strategy.

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Analysis of Oil Film Morphology of Valve Plate Pair in Axial Piston Pump

Analysis of Oil Film Morphology of Valve Plate Pair in Axial...

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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Xufeng Chen Liang Yan Xiaoshan Gao School of Automation Science and Electrical Engineering Beihang University Beijing China School of Automation Science and Electrical Engineering Beijing China Ningbo Institute of Technology Beihang University Ningbo China Tianmushan Laboratory Hangzhou China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

ISBN: (数字)9798350360868

ISBN: (纸本)9798350360875

In this paper, we delve into the oil film morphology of the valve plate pair in the axial piston pump. Specifically, we introduce the Euler method for multi-coordinate transformation and establish the oil film morphology equation when the cylinder is inclined and eccentric relative to the valve plate. Meanwhile, it is necessary to point out that the oil film morphology equation can also reflect the position of the valve plate relative to the cylinder. In order to verify the proposed oil film morphology equation, we carry out simulation verification. The simulation results show that the oil film morphology equation can well describe the oil film shape of the valve plate pair. The study of the oil film morphology equation can lay a foundation for the subsequent study of the lubrication and friction characteristics of the valve plate pair.

关键词： Pistons Shape Oils Friction Simulation Morphology Valves

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The Continuous State control of Flight Environment Testbed Based on State Feedback and LPV

The Continuous State Control of Flight Environment Testbed B...

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International Conference on Autonomous Unmanned Systems, ICAUS 2021

作者： Lun, Yuebin Wang, Honglun Zhang, Song Dan, Zhihong Qian, Qiumeng Pei, Xitong Yang, Zhiyuan School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Shenyuan Honors College Beihang University Beijing100191 China Science and Technology on Altitude Simulation Laboratory Sichuan Gas Turbine Establishment Aero Engine Corporation of China Sichuan Mianyang621000 China

ISBN: (纸本)9789811694912

Flight environment testbed (FET) of Altitude Ground Test Facilities (AGTF) is gradually become the main method of engine testing and simulation. FET is a two-input two-output nonlinear system, and there is a large coupling between the two input and output channels. At present, there are few researches on decoupling of the FET system, so we propose to use the classical state feedback method to achieve it. Considering that the simulation of FET is often a continuous task profile, the linear parameter varying (LPV) is combined with state feedback control in this study to realize continuous state control. The linearization of the system and the LPV will generate certain errors, we propose to add the extended state observer (ESO) to estimate and compensate the errors. Finally, the effectiveness of the proposed method is proved by comparing with the traditional PID method. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： State feedback

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A Health Assessment Strategy for Helicopter Emergency Floatation System

A Health Assessment Strategy for Helicopter Emergency Floata...

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International Conference on Guidance, Navigation and control, ICGNC 2020

作者： Ding, Qiyan Sun, Zhi Cheng, Lihong Lu, Ningyun Jiang, Bin College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing210000 China Key Laboratory of Aircraft Environment Control and Life Support MIIT Nanjing University of Aeronautics and Astronautics Nanjing210016 China Aviation Key Laboratory of Science and Technology on Life-Support Technology Xiangyang441003 China

ISBN: (纸本)9789811581540

When taking salvaging missions, helicopters play important roles but still face high risk because of complex circumstance. Emergency Floatation System (EFS) is critical to ensure flight safety and conduct emergency rescue for helicopters. To achieve this goal, the reliability of EFS itself is the first concern during its design and development. This paper presents a health assessment strategy for EFS of helicopters, based on multi-signal flow graph modeling, fault tree based diagnosis and Bayesian Networks (BN) based assessment. The simulation results can show that the developed strategy is feasible to evaluate the health status of EFS, which will be helpful for the maintenance division to take proper precautions to avoid potential accidents. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Bayesian networks

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