Adaptive control research for electro-hydraulic position servo system

The electro-hydraulic location servo system was deserved from known parameters. For the systematic errors aroused by inside parameters or outside disturbance, two kinds of model references adaptive control have been applied. The first one, by founding the goal function, the adaptive control system made the controlled object approach the reference model with local parameters was optimum. Through simulating by means of Matlab, it shows that the system with the law of adaptive control responded instantly and had certain adaptive ability for sudden loading and disturbances. The second one was the adaptive control with state observation ware. Through founding the state observation ware and using Matlab function, the feedback matrix of the state observation ware has been got, and the state observation ware constructed all variables of the system according to a few input or output variables to realize the control function. Thus, the system has good robustness and self-adaptive ability for the change of parameters or outside disturbances.