title: Delay-dependent guaranteed-cost control based on combination of Smith predictor and equivalent-input-disturbance approach.
abstract: This paper presents a new system configuration and a design method to improve control performance for a system with an input time delay and disturbances. The equivalent-input-disturbance approach is extended to handle a time-delay system. It is combined with the Smith predictor to reject disturbances. A delay-dependent stability condition is devised in terms of a matrix inequality by using the free-weighting matrix approach. The gain of the observer is designed by applying the cone complementary linearization method to the matrix inequality. A numerical example demonstrates the validity of the method.
authors.affiliation: School of Information Science and Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Gao
authors.affiliation: School of Automation, China University of Geosciences, Wuhan, Hubei 430074, China. Electronic address: wumin@cug.edu.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Wu
authors.affiliation: School of Automation, China University of Geosciences, Wuhan, Hubei 430074, China; School of Engineering, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan.
authors.forename: Jinhua
authors.initials: J
authors.lastname: She
authors.affiliation: School of Automation, China University of Geosciences, Wuhan, Hubei 430074, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: He
keywords: Cone complementary linearization; Equivalent input disturbance (EID); Free-weighting matrix; Guaranteed-cost control; Smith predictor; Time delay