Feedback Control for Retrieving an Electro-dynamic Tethered Sub-satellite
This paper presents a model predictive control (MPC) scheme for the retrieval of an electro-dynamic tethered sub-satellite in an inclined orbit. The scheme accounts for in-plane as well as out-of-plane motions. The control action is realized by adjusting only the tensional and electro-dynamic forces in the tether. Even though the proposed feedback law is not analytically explicit, it is easy to determine it by using a rapid re-computation of open-loop optimal control online and updating the control command at a fixed sampling interval. For each online step, the open-loop optimal control problem is solved by discretizing the continuous control problem first and then numerically solving the resulting large-scale optimization problem via nonlinear programming. The design of the feedback controller is based on a simple model which enjoys the advantage of low computational effort required for optimization, whereas the effectiveness and robustness of the proposed strategy are demonstrated by using a multi-body dynamics model of much higher fidelity.
electro-dynamic tether optimal control predictive control nonlinear programming
Hao Wen Dongping Jin Haiyan Hu
Institute of Vibration Engineering Research, MOE Key Lab of Structure Mechanics and Control for Aircraft, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China
国际会议
北京
英文
1-5
2008-10-23（万方平台首次上网日期，不代表论文的发表时间）