摘要
针对常规PID控制对温控系统中遇到的非线性、大滞后及参数时变的复杂对象时控制性的不足,提出了一种改进型模糊PID控制策略。先根据专家系统控制思想直接对模糊控制规则表进行设定,再利用改进后的模糊PID控制策略对PID控制器参数进行实时修正。改进后的模糊PID控制策略既有模糊控制的抗干扰性强的优点,又有专家系统控制精度高的优点。仿真及实际应用结果表明,这种改进型模糊PID控制器,较一般的模糊PID控制器具有更好的动态特性,尤其具有很好的稳态特性。
An improved PID control strategy is put forwarded aimed to the insufficient control performance when conventional PID control meets complex objects with nonlinearity,big hysteresis and parameter time varying in temperature control system.Firstly,the fuzzy control rule table is set according to the expert system control conception.Then the PID controller parameters are corrected by making use of improved fuzzy PID control strategy at real time.Improved fuzzy PID control stategy has the advantage of strong anti-interference performance of fuzzy control,and has high accuracy of expert system control.Compared with general fuzzy PID controller, the proposed controller has better dynamic characteristics and stability characteristics.
出处
《控制工程》
CSCD
北大核心
2010年第S2期79-80,88,共3页
Control Engineering of China
