一种机械谐振下的控制带宽扩展方法

Method for controlling bandwidth expansion with mechanical resonance

针对系统固有机械谐振影响光电稳定跟踪系统频带宽度的问题,提出了一种机械谐振下的控制带宽扩展方案。该方案借助系统频率特性测量方法,利用最小二乘参数辨识算法实现。试验结果表明,利用本文方案,速度闭环下的谐振峰值减小至原来的1/3,控制带宽提高了接近2倍,证明本文提出的方案能够有效实现机械谐振抑制,提高系统控制带宽,保证系统稳定性能。

The inherent structure resonance has an impressive influence on the bandwidth of the opto-electronic stabilized tracking system.Aiming at the problem,a method for controlling the bandwidth expanding under structure resonance was proposed.In the method,the measurement of frequency characteristic and the least squares parameters identification algorithm were utilized.The results of experiment show that,by the method proposed in the paper,the resonance peak can reduce to 1/3in speed close-loop and the control bandwidth can increase to about twice of the former,which prove that the method can suppress the structure resonance efficaciously,thereby improve the system control bandwidth,as well as ensure the system stability.