应用基因表达式编程(GEP)优化PID调解器参数,提出了基于GEP的PID参数优化策略和适应度函数的设计方法;提出了基于GEP的PID参数优化的GEP—PID算法。实验表明,与Ziegler—Nichols(ZN)法相比,该算法使系统阶跃响应的超调量下降了65.45%,上升时间和调整时间分别缩短了38.5%和61.5%。
In order to apply the genetic representation of gene expression programming (GEP) in PID parameter optimization, a PID parameters optimization strategy based on GEP and techniques of fitness function designed is proposed; and an optimization algorithm named GEP-PID algorithm is proposed. Experiments show that, compared with Ziegler-Nichols method, the maximum overshoot σ declines 65.45% , the settling time ts shorts 38.5% and the rise time tr shorts 61.5%.