access icon free Non-fragile finite-time dissipative piecewise control for time-varying system with time-varying delay

This study is concerned with the problem of non-fragile finite-time dissipative (FTD) control for time-varying system with delay. The delay is time varying and belongs to a given interval. Finite-time bounded (FTB) and FTD concepts are introduced to time-varying system with delay. First, new FTB conditions are derived for time-varying system with delay by using a piecewise Lyapunov functional combined with reciprocally convex approach. Second, FTD conditions are obtained to guarantee that the time-varying system with delay is not only FTB but also satisfies a dissipative performance index. Moreover, based on the FTD conditions, the non-fragile piecewise feedback controllers are designed in terms of linear matrix inequalities (LMIs). In addition, an LMI-based iterative algorithm is given to obtain the piecewise feedback non-fragile controller gains. Finally, numerical examples demonstrate the effectiveness of the proposed method.

Inspec keywords: Lyapunov methods; delays; linear matrix inequalities; time-varying systems; iterative methods; performance index; control system synthesis; feedback

Other keywords: time-varying system; dissipative performance index; time-varying delay; reciprocally convex approach; finite-time dissipative control; nonfragile finite-time dissipative piecewise control; LMI-based iterative algorithm; piecewise Lyapunov functional; piecewise feedback nonfragile controller gains; linear matrix inequalities; nonfragile piecewise feedback controllers; finite-time bounded

Subjects: Control system analysis and synthesis methods; Stability in control theory; Distributed parameter control systems; Time-varying control systems; Interpolation and function approximation (numerical analysis); Linear algebra (numerical analysis)

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cta.2018.5771
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