空间微重力主动隔振系统自抗扰控制

Active Disturbance Rejection Control for Microgravity Active Vibration Isolation System in Space Station

良好的空间微重力环境是开展各类空间科学实验的重要保证,然而由于各种扰动的存在,空间站内部微重力水平并不理想.基于此,本文在对微重力主动隔振系统的结构、动力学模型及控制目标进行理论分析的基础上,引入自抗扰控制方法,通过设计加速度控制回路、位置控制回路以及模型信息补偿,实现了系统位置控制和隔振控制的双重控制目标.最后,通过数字仿真对比,验证了本文所提出的控制方案具有优越的控制性能.

A well-designed space microgravity environment is important for microgravity science experiments. However,the actual microgravity acceleration level of space stations is far from ideal because of various disturbances. To address this problem,an active disturbance rejection control( ADRC) method is proposed based on a theoretical analysis of the structure,a dynamic model,and control objectives of the microgravity active vibration isolation system. Through the acceleration and position feedback along with the model compensation,the requirement for position control and vibration isolation is satisfied. Comparisons among numerical simulations demonstrate the superior performance of the proposed scheme.