Passivity-based adaptive tracking control of spacecraft line-of-sight relative motion with thrust saturation |
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| Institution: | 1. Institute of Systems Science and Technology, School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. Center for Control Theory and Guidance Technology, Harbin Institute of Technology, Harbin 150001, China;1. College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266061, PR China;2. Faculty of Information Technology, Beijing University of Technology, Beijing 100124, PR China;1. School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan 430074, China;2. Key Laboratory of Image Processing and Intelligent Control, Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China;3. Department of Mathematics, Texas A&M University at Qatar, Doha 23874, Qatar;4. School of electrical engineering and telecommunications, University of New South Wales, Sydney, NSW 2052, Australia;5. Information engineering school of Nanchang university, Nanchang 2052 China;1. School of Automation, China University of Geosciences, Wuhan 430074, China;2. Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems, Wuhan 430074, China;3. Engineering Research Center of Intelligent Technology for Geo-Exploration, Ministry of Education, Wuhan 430074, China |
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| Abstract: | This paper considers the control problem of spacecraft line-of-sight (LOS) relative motion with thrust saturation in the presence of unmodeled dynamics, external disturbance and unknown mass property. By using skew-symmetric property, reference trajectory generator and anti-windup technique, a novel passivity-based adaptive sliding mode control (SMC) scheme is proposed without prior knowledge of uncertainty/disturbance bound. Within the Lyapunov framework, the establishment of a real sliding mode (which induces the practical stability of closed-loop error system) is validated. The main contributions are that a new control gain adaptive algorithm is adopted to attenuate the overestimation of switching gain and a differentiable projection-based parameter adaptive algorithm is proposed to force the mass approximator to remain in a desired domain, then the adaptive control law is modified by the reference trajectory generator and anti-windup technique to compensate for the effect of thrust saturation. Finally, simulations are conducted to show the fine performance of proposed control scheme. |
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