摘要
在对PID控制与模糊控制进行对比的基础上提出了一种模糊PID复合控制方案。首先,分别设计了一个常规PID控制器和一个基本模糊控制器;然后,对两种控制方案进行了仿真对比研究,并对它们的优缺点进行了评价;最后,为了将两种方案取长补短、优势互补,设计了一种模糊PID复合型控制器。该复合控制器根据偏差范围的大小,通过模糊控制与PID控制的自动切换来实现控制,当偏差较大时采用模糊控制方式,以减小超调量并缩短调节时间;当偏差较小时切换至PID控制以消除稳态误差,该复合控制器将模糊控制动态性能好与PID控制稳态精度高的优点相结合,其综合性能优于常规PID控制和基本模糊控制。仿真结果证明以上方案的正确性和有效性。
A fuzzy-PID composite control method is presented based on the comparison of fuzzy control and PID control. First, a common PID controller and a basic fuzzy controller are designed separately; and then, the advantages and disadvan tages between the two methods are evaluated after their comparative study; at last, a fuzzy-PID composite controller is designed in order to draw on each other＇s merits. The composite controller can control a system by automatic switching between fuzzy control and PID control according to the range of error, if the error is large, the fuzzy control acts to reduce overshoot and shorten regulating time, else, the PID controller acts to remove static error. It combines the merits of the two control methods, and its synthetic qualities are better than the common PID control and the basic fuzzy control. The results of the simulation show the correctness and validity of the methods.
出处
《自动化技术与应用》
2011年第11期21-25,共5页
Techniques of Automation and Applications
