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Prescribed-time cooperative guidance law with seeker-less followers against multiple targets

ISA Transactions 2025年

作者： Wu, Yunjie An, Xuman Hua, Yueyang Li, Guofei Li, Bohao State Key Laboratory of Virtual Reality Technology and System Beihang University Beijing100191 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China School of Astronautics Northwestern Polytechnical University Xi'an710072 China China Academy of Launch Vehicle Technology Beijing100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Beijing Institute of Control and Electronic Technology Beijing100038 China

In this paper, a grouped prescribed-time cooperative guidance law (GPCGL) is proposed for multiple vehicles to attack multiple targets without collision, where one leader and seeker-less followers are involved in each subgroup. A distributed guidance law is presented for leaders to achieve separated time attack on their respective targets, while the guidance law for followers consists of two parts: tangential direction and normal direction in the follower-to-leader line-of-sight (LOS) frame. For the former, a proportional consensus guidance law is proposed based on an auxiliary control term to guarantee both the intra-subgroup cooperation and distance-based collision avoidance simultaneously;for the latter, a dynamic LOS angle constrained guidance law is applied to achieve direction-based collision avoidance. The proposed GPCGL is proved to be prescribed-time convergent, where the states can converge within the prescribed time. Simulations are carried out to verify the effectiveness. © 2025 Elsevier Ltd

关键词： Group theory

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Corrigendum to “Experimental investigation on the performance of a high capacity dual compensation chamber loop heat pipe under the effect of acceleration” [Case Stud. Therm. Eng. 61 (2024) 105013]

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Case Studies in Thermal Engineering 2024年 61卷

作者： Huanfa Wang Guiping Lin Yuandong Guo Xiaobin Shen Wenzhao Zhao Lizhan Bai Laboratory of Fundamental Science on Ergonomics and Environmental Control School of Aeronautic Science and Engineering Beihang University Beijing 100191 China Hangzhou International Innovation Institute Beihang University Hangzhou 311115 China Aircraft and Propulsion Laboratory Ningbo Institute of Technology Beihang University Ningbo 315100 China

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Retraction Note: Quantum optics and channel coding in imaging: advancements through deep learning

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Optical and Quantum Electronics 2024年第11期56卷 1-1页

作者： Chen, Liang Xu, Yue Wen, Hong Chen, Zhiwei Hou, Wenjing University of Electronic Science & Technology of China (UESTC) Chengdu China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu China Sichuan Provincial Engineering Research Center of Communication Technology for Intelligent IoT Chengdu China

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Predefined Finite-time Output Containment of Nonlinear Multi-Agent Systems with Undirected Topology

Predefined Finite-time Output Containment of Nonlinear Multi...

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International Conference on control, Automation, Robotics and Vision (ICARCV)

作者： Qing Wang Shiyu Zhou Siquan Zhou Xiwang Dong Jianglong Yu Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing P.R. China

ISBN: (数字)9781728177090

ISBN: (纸本)9781728177106

This paper focuses on the finite-time output containment problem for a kind of nonlinear multi-agent systems with multiple dynamic leaders. Firstly, considering the topological structure among the followers, a kind of adaptive distributed observer is designed to estimate the whole states of all the leaders. By utilizing common Lyapunov theory, the finite-time convergence of proposed distributed observer is proved. On the basis of this conclusion, a containment control protocol including the desired convex combinations of the leaders is developed for each follower by using the given weights. With the help of the output regulation theory, the finite-time output containment criterion for nonlinear multi-agent systems is derived. Finally, a numerical example is presented to demonstrate the effectiveness of the theoretical results.

关键词： Observers Protocols Topology Adaptive control Regulation Convergence Technological innovation

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Impact of residual stress on high and very high cycle fatigue behaviours of Inconel 718 at room temperature and 650 °C

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International Journal of Fatigue 2025年

作者： Yong-Jie Wang Hua-Yan Hu Yi-Fan Yang Nai-Jian Dong Xiang-Fan Nie Jian-Feng Wen Miao Song Yong-Hui Chen Shan-Tung Tu Key Laboratory of Pressure Systems and Safety Ministry of Education School of Mechanical and Power Engineering East China University of Science and Technology Shanghai 200237 China School of Nuclear Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Science and Technology on Plasma Dynamic Laboratory Air Force Engineering University Xi’an 710038 China Shanghai Institute of Aircraft Mechanics and Control 130 Meilong Road Shanghai 200237 China National Key Laboratory of Strength and Structural Integrity Aircraft Strength Research Institute of China Xi’an 710065 China

High and very high cycle fatigue behaviours are influenced not only by the machined surface quality but also by the inherent stress state of components. In the study, the influence of inherent residual stress state within a forged Inconel 718 turbine disc on high and very high cycle fatigue life was investigated through ultrasonic fatigue testing at 20 °C and 650 °C. At 20 °C, the exterior of the turbine disc exhibited approximately 190 MPa higher fatigue limit compared to the interior, attributed to inherent compressive residual stress partially offsetting the applied stress, thereby reducing the mean stress. However, this discrepancy in fatigue limit between the exterior and interior positions became negligible at 650 °C due to stress relaxation during high temperature. A modified Basquin model incorporating surface quality and inherent residual stress effects on fatigue life was proposed. This modified model accurately predicated fatigue life for specimens with varying inherent residual stress and surface conditions at 20 °C and 650 °C, with fatigue data falling into the range of life factors ±3, compared to the range of life factors ±30 in classical Basquin model.

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Research on multi-uavs formation flight control based on fuzzy pid 8

Research on multi-uavs formation flight control based on fuz...

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8th International Conference on Computing and Pattern Recognition, ICCPR 2019

作者： Jiang, Xiangwei Zhao, Boxin Zhang, Boyang Chen, Xiaolong Wang, Xiongwei Air Force Engineering University Xi'an710038 China Science and Technology on Aircraft Control Laboratory Xi'an710038 China

ISBN: (纸本)9781450376570

Small Unmanned Aerial Vehicle (UAV for short) has advantages of low cost, light and flexible. But single UAV also has disadvantages of lack of sight distance, sole access to information, limited airborne computing resources, etc. In order to overcome those weaknesses, UAV is undergoing a change for formation cluster. Moreover, UAV formation control is a key technology to ensure effective cooperative formation flight of UAV. [1] Therefore the paper studied the fuzzy PID controller for formation control of mini quad-rotor UAV through MATLAB simulation and contrast with the typical PID controller. © 2019 Association for Computing Machinery.

关键词： Unmanned aerial vehicles (UAV)

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Live-fly experimentation for pigeon-inspired obstacle avoidance of quadrotor unmanned aerial vehicles

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science China(Information sciences) 2019年第5期62卷 161-168页

作者： Mengzhen HUO Haibin DUAN Qing YANG Daifeng ZHANG Huaxin QIU Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical EngineeringBeihang University (BUAA)

In this paper, we applied a pigeon-inspired obstacle-avoidance model to the flight of quadrotor UAVs through environments with obstacles. Pigeons bias their flight direction by considering the largest gap and minimum required steering. Owing to the similarities between pigeon flocks and UAV swarms in terms of mission requirements, the pigeon-inspired obstacle-avoidance model is used to control a UAV swarm so that it can fly through a complex environment with multiple obstacles. The simulation and flight results illustrate the viability and superiority of pigeon-inspired obstacle avoidance for quadrotor UAVs.

关键词： UAV swarm pigeon flock pigeon-inspired model obstacle-avoidance live-fly experimentation

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Design and Analysis of Joint-Assisted Exoskeleton control System of Upper Limb in Active Spacesuit

Design and Analysis of Joint-Assisted Exoskeleton Control Sy...

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第三十九届中国控制会议

作者： Zhaoyang Li Yuehong Dai Jiejun Hu Junyao Wang Peng Tang University of Electronic Science and Technology of China Research Center of Intelligent Aircraft System Technology and Application of UESTC Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province

Based on joint-assisted exoskeleton technology, a concept of active spacesuit for future extraterrestrial exploration activities is presented. Firstly, we design the mechanical structure of joint-assisted exoskeleton of upper limb, and perform kinematic analysis on the upper limb to obtain the joint motion information when lifting load. We obtain the resistance torque of the spacesuit joint by the measuring equipment, and the total torque of the upper limb by the simplified two-links dynamic ***, we present the combination of adaptive impedance control and sliding mode control that based on CTC method. Finally, the prototype of joint-assisted exoskeleton robot of upper limb is fabricated and tested, and the experimental results indict that the control system can improve the trajectory tracking effect and eliminate the influences of environmental change. The research can not only help the astronauts more easily complete the task of collecting samples of the future manned space missions, but also provide a theoretical foundation for the subsequent research of active spacesuit.

关键词： Active Spacesuit Exoskeleton Adaptive Impedance control Upper Limb Extraterrestrial Exploration

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Accelerated performance degradation test and analysis of high-temperature strain gauges

Accelerated performance degradation test and analysis of hig...

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13th International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE 2023)

作者： L. Li Z. Wang N. Yang Q. Wu H. Wang Z. Mao K. Ren Q. Wang Y. Wang National Key Laboratory of Strength and Structural Integrity School of Aeronautic Science and Engineering Beihang University Beijing People's Republic of China Shenyang Aircraft Design and Research Institute Shenyang People's Republic of China Institute of Spacecraft System Engineering China Academy of Space Technology Beijing People's Republic of China Navigation Instrument Research Institute Tianjin People's Republic of China Beijing Institute of Control Engineering Beijing People's Republic of China

ISBN: (数字)9781839539275

With the extension of the service time of the structure and the worse service temperature conditions, the drift problem of hightemperature strain gauges gradually becomes prominent. This research aims to address the issue of the drift of measurement results because of the performance degradation of high-temperature strain gauges, and investigate the drift law under different temperatures considering complex service environments. In this paper, a combination of experimental research and theoretical analysis is utilized to design and conduct the accelerated performance degradation test on high-temperature strain gauges. Based on the result of the test, an accelerated performance degradation model is developed using the Wiener process and Arrhenius model. Finally, estimation curves for the average value and percentile value of the performance parameters of the hightemperature strain gauges are obtained, which demonstrates that the established accelerated performance degradation model can reasonably describe the degradation law. Additionally, the established accelerated performance degradation model enables effective analysis and compensation of gauge drift at any temperature.

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Two Degree-of-Freedom Dynamic Theoretical Model on Tile Thermal Protection System

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第1期36卷 139-145页

作者： HUANG Jie YAO Weixing KONG Bin YANG Jiayong WANG Man ZHANG Qingmao Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and Astronautics State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics AVIC Chengdu Aircraft Design and Research Institute

In order to study the dynamic behaviors of the thermal protection system(TPS)and dynamic strength of the strain-isolation-pad(SIP),a two degree-of-freedom dynamic theoretical model is presented under the acoustic excitation and base excitation. The tile and SIP are both considered as the elastic body and simplified as a mass point,a linear spring and a damping element. The theoretical solutions are derived,and the reasonability of theoretical model is verified by comparing the theoretical results with the numerical results. Finally,the influences on the dynamic responses of TPS by the structural damping coefficient of TPS,elasticity modulus and thickness of SIP are *** results show that the material with higher damping,and SIP with thicker size and lower elastic modulus should be considered to reduce the dynamic responses and intensify the security of TPS. The researches provide a theoretical reference for studying the dynamic behaviors of TPS and the dynamic strength of SIP. Besides,the dynamic theoretical model can be used as a quick analysis tool for analyzing the dynamic responses of TPS during the initial design phase.

关键词： thermal protection system dynamic theoretical model acoustic excitation base excitation

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