一种CMG框架伺服系统的改进自抗扰控制策略

Gimbal Servo System of CMG Based on Improved-LADRC

针对传统线性自抗扰控制器(LADRC)无法有效抑制控制力矩陀螺(CMG)框架伺服系统中存在的周期性高频扰动的问题,利用周期性高频扰动的先验信息对LADRC中的线性扩张状态观测器(LESO)进行了状态重构,通过带宽法整定了状态增益。仿真结果表明,经过改进的LADRC在抑制周期性扰动方面效果显著,基本消除了周期性高频扰动造成的CMG框架伺服电机转速波动,使系统跟踪性能进一步提升。

The periodic high frequency disturbance can not be suppressed by traditional linear active disturbance rejection controller(LADRC) in the gimbal servo system of control moment gyro(CMG). In order to solve this problem, the LADRC is reconstructed according to the nature of periodic high frequency disturbance. The state gains are adjusted by using bandwidth method. The simulation results show that the influence of the periodic disturbance can be greatly reduced by using the improved-LADRC in the gimbal servo systems of CMG and the tracking performance of the system is further improved.