Approaching trajectory optimization for disposed uncontrolled rotating GEO satellite capture based on pseudospectral method
- Paper number
IAC-11,A6,5,11,x11822
- Author
Mr. Ren Xianhai, College of Aerospace and Materials Engineering, National University of Defense Technology, China
- Coauthor
Prof. Yang Leping, National University of Defense Technology, China
- Coauthor
Mr. Zhu Yanwei, National University of Defense Technology, China
- Year
2011
- Abstract
Geostationary orbit is a scarce resource due to its critical position and limited acceptance. However, GEO is getting increasingly crowded, which calls for more effective and professional means of off-orbit service. Against the mission backdrop of off-orbit maneuver of disposed uncontrolled rotating GEO satellite, this study is mainly focused on its approaching trajectory optimization during the process of capture. Considering the coupled control of attitude and relative orbit, this paper firstly sets up a 6-DOF dynamics model after introducing the nonlinear relative motion model and attitude kinematics model. Secondly, given the various constraints of attitude, security, control and terminal state, the problem of coupled control of attitude and relative orbit is represented as the optimal control problem of minimal fuel consumption in continuous time domain and with many constraints. Thirdly, it designs the adaptive Radau pseudospectral method, capable of autonomously determining the collocation numbers, which transforms continuous control problem into discrete nonlinear design problem for solution. Simulation results prove the effectiveness of the model, and using this given solution, collocation can be adjusted in accordance with the precision requirements, increasing the computing efficiency.
- Abstract document
- Manuscript document
IAC-11,A6,5,11,x11822.pdf (🔒 authorized access only).
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