Optimal guidance for reentry vehicles based on indirect Legendre pseudospectral method |
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| Authors: | Bailing Tian Qun Zong |
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| Institution: | 1. The Tianjin Key Laboratory of Process Measurement and Control, School of Electric and Automation Engineering, Tianjin University, Tianjin 300072, China;2. Aeronautical Automation College, Civil Aviation University of China, Tianjin 300300, China;1. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;2. School of Automation, Beijing Institute of Technology, Beijing, 100081 China;3. Key Laboratory of Dynamics and Control of Flight Vehicle, Ministry of Education, Beijing, 100081, China;4. Key Laboratory of Autonomous Navigation and Control for Deep Space Exploration, Ministry of Industry and Information Technology, China;1. Department of Aerospace Science and Technology, Space Engineering University, Beijing 101416, P.R. China;2. Graduate School, Space Engineering University, Beijing 101416, P.R. China;3. College of Aeronautics and Astronautics, National University of Defense Technology, Changsha 410073, P.R. China |
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| Abstract: | Development of a feasible guidance scheme for reentry vehicles is a challenge because of its significant nonlinearity and multi-constraints. A method for the implementation of three-degree-of-freedom guidance for constrained reentry vehicle is presented in the paper. First, the constrained trajectory is generated by Legendre pseudospectral method (LPM) and then the feasibily of the trajectory is validated. Based on the obtained reference trajectory, the guidance problem is converted into a trajectory state regulation problem which is a linear time varying system. A robust state feedback guidance law is generated in real time using indirect Legendre pseudospectral feedback method. Finally, simulation results illustrate that the overall guidance scheme can lead to a very accurately controlled flight with all the constraints satisfied even in the presence of initial state uncertainty. |
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