Sequently it deals with frequency characteristics of the rudder and loading systems in matlab and simulate the system with 20 - sim . when improve the loading performance with adding the structure invariance principle to eliminate surplus force . to improve loading performance of loading system controlled by p - q servo - valve , this dissertation analyzes the uncertainties of electro - hydraulic load simulator , then designs a robust controller 在此基础上,应用matlab对舵机系统和加载系统进行频域分析,利用20 - sim软件完成对系统的时域仿真,并采用结构不变性原理来抑制多余力干扰,改善系统的加载性能。
