载人空间飞行器自抗扰主动隔振优化控制

摘要

The space microgravity active vibration isolation system is designed to provide the ideal space microgravity for the space science experiments by isolating the disturbances inside the manned spacecraft.However,the active vibration isolation system based on the existing control methods is difficult to achieve ideal performance of vibration isolation because of its obvious nonlinearity,strong coupling and parameter uncertainties.An ADRC (Active Disturbance Rejection Control) method is proposed based on the analysis of the physical structure and dynamic model of the system.Through the acceleration and position feedback,the requirement for vibration isolation is well-satisfied.The numerical simulations in the presence of system uncertainties and disturbances demonstrate the remarkable superiority of the proposed controller in terms of vibration isolation ability and robustness.The simulation results show that,compared with the existing control scheme,the optimal control of microgravity active vibration isolation in the manned spacecraft based ADRC has been well-realized.%在飞行器隔震抗扰优化中,针对微重力主动隔振系统对载人空间飞行器内部存在的扰动进行隔离,为各类空间科学实验提供良好的微重力环境.由于系统存在明显的非线性、强耦合以及参数不确定性,现有控制方案下主动隔振系统难以实现理想的扰动隔离效果.对主动隔振系统物理结构及动力学模型进行分析,引入自抗扰控制方法,并设计位移控制回路和微重力控制回路,对系统扰动进行补偿,实现了有效的主动隔振优化控制.通过数值仿真对比,在系统不确定性的情况下,所提出的控制器在隔振能力及鲁棒性能上具有显著的优越性.仿真结果表明,自抗扰主动隔振方案,有效实现了载人空间飞行器内部微重力水平的优化控制.