Nonlinear dynamics and station-keeping control of a rotating tethered satellite system in halo orbits

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• 作者：Gang Liu ; Jing Huang ; Guangfu Ma ; Chuanjiang Li
• 关键词：Halo orbit ; Restricted three-body problem ; Station-keeping control ; Suboptimal control ; Tethered satellite system
• 刊名：Chinese Journal of Aeronautics
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：26
• 期：5
• 页码：1227-1237
• 全文大小：1577 K

文摘

The dynamics of a rotating tethered satellite system (TSS) in the vicinity of libration points are highly nonlinear and inherently unstable. In order to fulfill the station-keep control of the rotating TSS along halo orbits, a nonlinear output tracking control scheme based on the ¦È-D technique is proposed. Compared with the popular time-variant linear quadratic regulator (LQR) controller, this approach overcomes some limitations such as on-line computations of the algebraic Riccati equation. Besides, the obtained nonlinear suboptimal controller is in a closed form and easy to implement. Numerical simulations show that the TTS trajectories track the periodic reference orbit with low energy consumption in the presence of both tether and initial injection errors. The axis of rotation can keep pointing to an inertial specific object to fulfill an observation mission. In addition, the thrusts required by the controller are in an acceptable range and can be implemented through some low-thrust propulsion devices.