基于θ-D非线性控制方法的伴随轨道控制
首发时间:2008-07-14
摘要:为了实现燃料消耗最少的伴随轨道控制,研究使用 次优非线性控制方法设计伴随轨道的优化控制律。相对运动模型中考虑了地球形状摄动的影响,且适用于在椭圆轨道上运行的目标航天器。采用状态变量增广法,对相对运动模型进行处理,以满足 控制的要求。采用相对轨道要素设计了理想的基准伴随轨道。仿真计算结果表明所设计的控制律是稳定的,能够以较少的燃料消耗实现伴随轨道的控制。
关键词: 伴随轨道 θ-D非线性控制方法 相对运动模型 相对轨道要素
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Periodic relative motion control based on the θ-D nonlinear control method
Abstract:In order to maintain long-term periodic relative motion trajectory with minimum fuel consumption, an optimal control method based on θ-D nonlinear control technique is investigated. A model of relative motion, considering the J2 perturbation and suitable for motion in general elliptic orbit, is used. The θ-D nonlinear control law is developed to control the relative motion by dealing with the model of relative motion with the method of extending the state variables. The periodic relative orbit is designed based on the relative orbit elements and the mission requirements. Simulation results indicate that the proposed control methodology could carry out the suboptimal control of the periodic relative motion.
Keywords: Periodic relative motion;θ-D nonlinear control;Relative motion model;Relative motion control
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