电液位置伺服系统的自适应控制

Adaptive Control Research for Electro-hydraulic Position Servo System

根据已知参数设计一电液位置伺服系统,针对系统中参数或外界干扰的变化引起系统的误差,对其使用了两种模型参考自适应控制:通过构建目标函数,使被控对象趋近于参考模型的以局部参数为最优的自适应控制,通过Matlab仿真表明,加了自适应控制器的系统响应明显变快,对突加负载和外干扰有自适应能力;采用状态观测器的自适应控制,通过构建状态观测器,并利用Matlab函数求解状态观测器的反馈矩阵,然后根据少量的输入输出变量由状态观测器构造系统的全部变量,用来实现控制作用,使系统对于参数变化或外界干扰具有很强的自适应能力和鲁棒性。

The electro-hydraulic lbcation 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 obiect 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.