Optimal Decoupling Control Method and Its Application to a Ball Mill Coal-pulverizing System  

作　　者：Yue Fu Chengwen Hong Jingyi Li 

机构地区：[1]State Key Laboratory of Synthetical Automation for Process Industries,Northeastern University

出　　处：《IEEE/CAA Journal of Automatica Sinica》2018年第6期1035-1043,共9页自动化学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(61573090);the Research Funds for the Central Universities(N130108001)

摘　　要：Abstract-The conventional optimal tracking control method cannot realize decoupling control of linear systems with a strong coupling property. To solve this problem, in this paper, an optimal decoupling control method is proposed, which can simultaneousiy provide optimal performance. The optimal decoupling controller is composed of an inner-loop decoupling controller and an outer-loop optimal tracking controller. First, by introducing one virtual control variable, the original differential equation on state is converted to a generalized system on output. Then, by introducing the other virtual control variable, and viewing the coupling terms as the measurable disturbances, the generalized system is open-loop decoupled. Finally, for the decoupled system, the optimal tracking control method is used. It is proved that the decoupling control is optimal for a certain performance index. Simulations on a ball mill coal-pulverizing system are conducted. The results show the effectiveness and superiority of the proposed method as compared with the conventional optimal quadratic tracking （LQT） control method.The conventional optimal tracking control method cannot realize decoupling control of linear systems with a strong coupling property. To solve this problem, in this paper, an optimal decoupling control method is proposed, which can simultaneously provide optimal performance. The optimal decoupling controller is composed of an inner-loop decoupling controller and an outer-loop optimal tracking controller. First, by introducing one virtual control variable, the original differential equation on state is converted to a generalized system on output. Then, by introducing the other virtual control variable, and viewing the coupling terms as the measurable disturbances, the generalized system is open-loop decoupled. Finally, for the decoupled system,the optimal tracking control method is used. It is proved that the decoupling control is optimal for a certain performance index.Simulations on a ball mill coal-pulverizing system are conducted.The results show the effectiveness and superiority of the proposed method as compared with the conventional optimal quadratic tracking(LQT) control method.

关 键 词：Ball mill coal-pulverizing system linear system optimal decoupling control optimal quadratic tracking （LQT）control. 

分 类 号：TM63[电气工程—电力系统及自动化] TH17[机械工程—机械制造及自动化]