基于自抗扰控制器的电动缸载荷系统研究

摘要

To simulate the load spectrum of the fatigue performance evaluation test system of the aircraft′s key components under extreme condition,the active disturbance rejection controller (ADRC) of the electric cylinder loading system was de-signed to estimate the system statues information and disturbance information,solve the accuracy control problem of the load spectrum under the extreme condition or undisturbed mathematical model condition,system stability problem caused by the un-certain system and disturbance caused by the changed extreme condition. The results of simulation experiment show that the con-trol effect of the active disturbance rejection control is better than that of the PID control,its response speed is faster and sys-tem antidisturbance capability is stronger under the same external conditions,and the controller can meet the requirements of the high loading accuracy of the servo electric cylinder loading control system,and high load spectrum repeatability and consis-tency of the experiment evaluation system.%针对航空飞行器关键部件疲劳性能评价试验系统准确模拟极端条件下载荷谱的要求,在电动缸载荷系统中通过设计自抗扰控制器(ADRC)估计系统的状态信息和扰动信息,解决在极端条件、无扰动数学模型条件下对规定载荷谱的精确控制问题;解决因极端条件变化带来的扰动和系统不确定性导致的系统稳定性问题.通过仿真试验,电动缸加载三阶系统的力闭环自抗扰控制系统在外部条件相同的条件下,自抗扰控制器的控制效果优于PID控制,响应速度更快,抗系统扰动能力更强,满足伺服电动缸加载控制系统加载精度高、试验评价系统载荷谱重复及一致性精度高的要求.