提出了一种规范化PID控制器参数混沌优化方案,并且利用增广Hermite-Biehler定理,讨论了不稳定被控对象闭环稳定的规范化PID控制器参数取值范围,在这取值范围内将混沌变量引入规范化PID参数的优化搜索,具有更强的搜索PID参数近似全局最优值的能力。仿真结果表明,该算法能有效地实现PID参数最优整定,为解决PID控制器参数近似全局最优设计提供了一种有效的方法。 In this paper, a chaos optimization scheme for normalized PID controller parameters is proposed. By using the augmented Hermite-Biehler theorem, the range of parameterization of the PID controller with closed loop stability of unstable controlled objects is discussed. Within this range, chaos variables By introducing the optimized search of normalized PID parameters, it has the ability of searching the PID parameters to approximate the global optimal value. The simulation results show that the proposed algorithm can effectively achieve the optimal tuning of PID parameters, which provides an effective method for solving approximate global optimal design of PID controller parameters.