新型智能比例积分微分控制器控制方法

The Study of a New Type Intelligent PID

建立一种基于时域响应曲线的控制区间划分方法,将各区间的控制规律统一为比例积分微分控制器(PID)控制,引入遗传算法优化设计各区间控制参数.在用误差过零及误差导数过零计数器确定主区间之后,该方法仅需要一个误差变量便可确定目标控制区间,从而提高查询控制参数的效率.数值仿真实例表明,文中方法是可行的,显著改善了控制效果.

A new dividing method of control region based on the time domain response is first established. The control rule of each region is then unified to PID control, and genetic algorithm is introduced to design the control parameters of each region. After seeking the main region by using a error-cross-zero counter and a error＇s derivative-cross-zero counter, only one variable of error is needed to determine the objective control region, thus promote the inquiring efficiency for the control parameters. Numerical simulation show that the new method is feasible and it greatly improved the control effect.