一种模糊-PI双模控制系统的仿真与设计

Simulation and design of a fuzzy-PI dual-mode control system

为了提高系统的控制性能,综合了模糊控制和PID控制的优点,提出一种基于模糊-PI双模控制器设计方法。典型的二维模糊控制器因缺少积分环节,难以消除稳态误差,控制的精度常常不能满足系统要求;而PI控制器具有良好的消除稳态误差的作用,所以将其与模糊控制器结合构成复合控制器。通过Matlab/Simulink仿真,结果表明,与经典的PID控制方式相比较,该控制方式在快速性、稳态性及准确性方面都有较大提高。

To improve the control performance of the system, the advantages of both fuzzy control and PID control are integrated. A controller design method based on fuzzy-PI control is proposed. For common fuzzy controller, to reduce steady- state error is not an easy job because of lacking tegrating element. Therefore the control accuracy often can not meet the system requirements. Conceruing that PI controller has a good effect on reducing steady-state error, this paper combined fuzzy controller and PI controller to structure a compound controller. The simulation result made by Matlab/Simulink shows that comparing with classical PID controller, the control method is greatly improved in some aspects such as rapidity, stabilization and accuracy.