摘要
提出了一种新的控制器来解决传统的PID控制器不能很好地控制的系统,如非线性系统、变结构系统等。使用无模型控制作为补偿,用来解决由时变参数和参数估计误差引起的系统跟踪误差。当把外环去掉时,就是PID控制器。如果PID控制效果已经达到了理想状态,即受控对象的输出已经跟踪了期望输出,无模型控制的输出控制信号不起作用。证明了无模型控制的收敛性,仿真结果表明了该方法的有效性。
A new controller is presented to solve the problems that the traditional PID controller can not control very well, such as the nonlinear system, variable structure system and so on. Using a model-free control as a compensation, the system tracking error caused by time-varying parameters and parameter estimation error can be solved. If the external loop is cut down, it is the PID controller. If the laiD controller gets the ideal state, i. e. the output of the controlled system has tailed after the desired output, the control signal of model-free adaptive control system does not work. The convergence of the model-free controller is proved. The simulation results show the efficiency of the method.
出处
《控制工程》
CSCD
2008年第2期131-134,共4页
Control Engineering of China
基金
国家自然科学基金资助项目(20577038)
