Composite nonlinear feedback control for output regulation problem of linear discrete-time systems with input saturation  

作　　者：Chongwen Wang Xing Chu Weiyao Lan 

机构地区：[1]School of Software,Beijing Institute of Technology [2]Department of Automation, Xiamen University

出　　处：《Journal of Systems Engineering and Electronics》2014年第6期1043-1055,共13页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61074004);the Research Fund for the Doctoral Program of Higher Education(20110121110017)

摘　　要：Transient performance for output regulation problems of linear discrete-time systems with input saturation is addressed by using the composite nonlinear feedback（CNF） control technique. The regulator is designed to be an additive combination of a linear regulator part and a nonlinear feedback part. The linear regulator part solves the regulation problem independently which produces a quick output response but large oscillations. The nonlinear feedback part with well-tuned parameters is introduced to improve the transient performance by smoothing the oscillatory convergence. It is shown that the introduction of the nonlinear feedback part does not change the solvability conditions of the linear discrete-time output regulation problem. The effectiveness of transient improvement is illustrated by a numeric example.Transient performance for output regulation problems of linear discrete-time systems with input saturation is addressed by using the composite nonlinear feedback（CNF） control technique. The regulator is designed to be an additive combination of a linear regulator part and a nonlinear feedback part. The linear regulator part solves the regulation problem independently which produces a quick output response but large oscillations. The nonlinear feedback part with well-tuned parameters is introduced to improve the transient performance by smoothing the oscillatory convergence. It is shown that the introduction of the nonlinear feedback part does not change the solvability conditions of the linear discrete-time output regulation problem. The effectiveness of transient improvement is illustrated by a numeric example.

关 键 词：output regulation composite nonlinear feedback in-put saturation transient performance discrete-time system 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]