导引头伺服系统稳定回路扰动观测器设计

Design of Disturbance Observer for Stability Loopof Seeker Servo System

摘要:

针对摩擦力矩等非线性环节导致的导引头伺服系统稳定回路控制性能变差现象,设计了一种基于输入输出数据的扰动观测器。推导了扰动观测器方程,分析了扰动观测器对干扰的抑制能力及由传感器引入的高频量测噪声对系统整体性能的影响。通过仿真验证,在稳定回路存在量测噪声的情况下,该扰动观测器依旧能够获得较为理想的去耦性能。

Abstract:

Aiming at the deterioration of control performance caused by nonlinearelements such as friction torque in the stability loop of seeker servo system, a disturbanceobserver based on input and output data is designed, The disturbance observer equation isderived, and the disturbance rejection ability of the disturbance observer for the system andthe influence of high-frequency measurement noise introduced by the sensor on the overa.perfoemance of the system are analyzed, The simulation results show that the disturbanceobserver can still obtain ideal decoupling performance of the stability loop in the presence ofmeasurement noise.