Space electromagnetic docking technology, free of propellant and plume contamination, offers continuous, reversible and synchronous controllability, which is widely applied in the future routine on-orbit servicing mis...Space electromagnetic docking technology, free of propellant and plume contamination, offers continuous, reversible and synchronous controllability, which is widely applied in the future routine on-orbit servicing missions. Due to the inherent nonlinearities, couplings and uncertainties of an electromagnetic force model, the dynamics and control problems of them are difficult. A new modeling approach for relative motion dynamics with intersatellite force is proposed. To resolve these control problems better, a novel nonlinear control method for soft space electro-magnetic docking is proposed, which combines merits of artificial potential function method, Lyapunov theory and extended state observer. In addition, the angular momentum management problem of space electromagnetic docking and approaches of handling it by exploiting the Earth＇s magnetic torque are investigated. Finally, nonlinear simulation results demonstrate the feasibility of the dynamic model and the novel nonlinear control method.展开更多
空间电磁对接具有不消耗推进剂、连续可逆控制能力和无羽流污染等优点,应用前景广阔。空间电磁对接控制难点在于强非线性、不确定性以及耦合性等问题。为此,论文综合采用线性扩张状态观测器(LESO,Line Extended State Observer)、反馈...空间电磁对接具有不消耗推进剂、连续可逆控制能力和无羽流污染等优点,应用前景广阔。空间电磁对接控制难点在于强非线性、不确定性以及耦合性等问题。为此,论文综合采用线性扩张状态观测器(LESO,Line Extended State Observer)、反馈线性化以及鲁棒H∞控制技术,设计空间电磁对接的鲁棒协调控制,并通过仿真检验所设计控制方案的性能及其鲁棒性。仿真结果表明,所设计的控制器不但可以观测到系统所有状态变量,而且能提高系统对模型不确定性以及外界干扰的鲁棒性,跟踪控制性能良好。展开更多
基金supported by the National Natural Science Foundation of China(11172322)
文摘Space electromagnetic docking technology, free of propellant and plume contamination, offers continuous, reversible and synchronous controllability, which is widely applied in the future routine on-orbit servicing missions. Due to the inherent nonlinearities, couplings and uncertainties of an electromagnetic force model, the dynamics and control problems of them are difficult. A new modeling approach for relative motion dynamics with intersatellite force is proposed. To resolve these control problems better, a novel nonlinear control method for soft space electro-magnetic docking is proposed, which combines merits of artificial potential function method, Lyapunov theory and extended state observer. In addition, the angular momentum management problem of space electromagnetic docking and approaches of handling it by exploiting the Earth＇s magnetic torque are investigated. Finally, nonlinear simulation results demonstrate the feasibility of the dynamic model and the novel nonlinear control method.
文摘空间电磁对接具有不消耗推进剂、连续可逆控制能力和无羽流污染等优点,应用前景广阔。空间电磁对接控制难点在于强非线性、不确定性以及耦合性等问题。为此,论文综合采用线性扩张状态观测器(LESO,Line Extended State Observer)、反馈线性化以及鲁棒H∞控制技术,设计空间电磁对接的鲁棒协调控制,并通过仿真检验所设计控制方案的性能及其鲁棒性。仿真结果表明,所设计的控制器不但可以观测到系统所有状态变量,而且能提高系统对模型不确定性以及外界干扰的鲁棒性,跟踪控制性能良好。
