In time lag system with interference, it is difficult for conventional controller to guarantee its interference suppression and stability.Combine fuzzy control with conventional PID control, a parameter self-tuning fuzzy PID controller is designed based on the time lag system.And according to its different output form, two methods, position type and incremental type, are developed to control the time lag system effectively.Then used the Simulink and fuzzy tool boxes of Matlab to take the computer simulation and concluded the general rules of adjusting the parameters of fuzzy PID controller.The results show that the incremental type is better with zero overshoot, no static error, shorter transient time and superior stability.%时滞系统在受到干扰时,常规控制器很难及时对干扰产生抑制作用,不能保证系统的稳定性.结合模糊控制和常规PID控制各自的优点,设计了一种参数自整定模糊PID控制器,并根据其输出形式的不同,分别采用了位置式和增量式两种方法对时滞系统进行了有效的控制.同时利用Matlab软件的Simulink和Fuzzy工具箱进行了计算机仿真,总结出了调整模糊PID控制器各参数的一般规律,仿真结果表明采用增量式输出方法时控制效果更好,并具有零超调、无静差、过渡时间短、稳定性好等特点.
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