Open AccessA novel set‐membership control strategy for discrete‐time linear time‐varying systems
Author(s) -
Zhang Yilian,
Yang Fuwen,
Han QingLong,
Zhu Yanfei
Publication year - 2019
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2018.5783
Subject(s) - control theory (sociology) , bounded function , set (abstract data type) , state (computer science) , constraint (computer aided design) , constructive , controller (irrigation) , mathematical optimization , mathematics , computer science , discrete time and continuous time , ellipsoid , class (philosophy) , control (management) , algorithm , artificial intelligence , process (computing) , mathematical analysis , statistics , programming language , physics , geometry , astronomy , agronomy , biology , operating system
A novel set‐membership control strategy is investigated for a class of discrete time‐varying systems with unknown‐but‐bounded noises. Different from some existing set‐membership estimation based control methods, the proposed control strategy is designed by using state estimation sets instead of some specific estimation points. The controlled performance requirement is modelled as a new set‐membership performance constraint which ensures that the controlled output meets the requirement at any time instant. First, the set‐membership filtering method is used for obtaining the ellipsoidal state estimation set. Second, a set‐membership controller is constructed by utilising the state estimation which is arbitrarily chosen from the corresponding estimation set. Accordingly, sufficient conditions are derived such that the controlled system is asymptotically stable and satisfies the proposed performance constraint in the presence of unknown‐but‐bounded noises at each time instant. Then, a constructive computational algorithm is provided to describe the proposed control strategy. Finally, illustrative simulation examples are presented to demonstrate the effectiveness of the proposed method.