H_2／H_∞组合控制器的设计方法  

Design Method of Mixed H_2/H_∞ Controller

作　　者：李占明 刘丽华 陈希平 

机构地区：[1]甘肃工业大学自动控制系

出　　处：《甘肃工业大学学报》1995年第3期87-91,共5页Journal of Gansu University of Technology

基　　金：甘肃省自然科学基金

摘　　要：用极大熵Ｈ＿∞的理论解决了Ｈ＿２／Ｈ＿∞组合控制器的设计问题．Ｈ＿２最优控制系统具有许多优良特性，但鲁棒性较差；与之相反，Ｈ＿∞最优控制较好地解决了系统的鲁棒性问题，但动态品质一般较差．Ｈ＿２／Ｈ＿∞组合优化理论将二者结合起来，很好地解决了鲁棒稳定性和动态品质之间的矛盾．针对水轮机调速系统设计了控制器，并对参数结构及负荷发生变化时的各种情况作了仿真研究．结果表明本文设计的控制器鲁棒性能和动态品质均比常规ＰＩＤ控制器好．he mixed controller with H_2/H_∞ is designed using the maximum entropy H_∞theory. The well known H_2 optimal control system has many good features, but worse ro-bustness. On the other hand. H_∞ optimal control theory does well with the robustness of a system,but behaves usually worse dynamicaly. Mixed H_2/H_∞ optimal control theory well re-solves the contradictory between the robust stability and the dynamic performance of a sys-tem. A controller is designed for the governing system of a hydraulic turbine. Computer sim-ulation is conducted for different configuration parameters and load varging operation regimeof the turbine.The results show that the robustness and dynamic behovior of the mixed H_2/N_∞ controller are both better than those of the classical PID controller.

关 键 词：极大熵 最优控制 鲁棒性 组合控制器 控制器 

分 类 号：TP273.1[自动化与计算机技术—检测技术与自动化装置]