基于阶跃模型的非线性模糊PID控制算法研究

针对大多数非线性系统建模和控制较困难的问题,引入了基于C-R模糊阶跃模型的非线性系统建模方法,该模型中的参数ai*是时变的,能够表征系统的非线性特征。根据C-R模糊阶跃模型的结构特点,与PID控制算法结合,将ai*表示出PID控制算法的参数,提出了非线性模糊PID控制算法CR-PID,克服了常规PID控制的参数难以较好地表征非线性的问题。通过对连续搅拌反应釜控制系统的仿真结果表明了该方法的有效性。

Nonlinear Fuzzy PID Control Algorithm Based on C-R Step Model

Considering the difficulty of modeling and controlling about the most nonlinear systems,nonlinear modeling method based on C-R step model was introduced,which the parameter was time-variable,so the model could be taken the nonlinear character of the system.According to the structural characteristics of CR-step fuzzy model,combined with PID that would be taken the parameters of PID.Nonlinear fuzzy PID control algorithm based on C-R fuzzy step model CR-PID was proposed.It overcame the characterization of nonlinear problem which the conventional PID control can＇t resolve.The simulation of the CSTR control system shows that the proposed strategy is effective.