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| Content Provider | IET Digital Library |
|---|---|
| Author | Xu, Tianbo Gao, Xianwen Pang, Guochen Qi, Wenhai Kao, Yonggui |
| Abstract | The problem of composite anti-disturbance control for semi-Markovian jump systems (S-MJSs) with time-varying delay via disturbance observer is analysed in this study. Unlike the existing methods, generally uncertain transition rates, time-varying delay, multiple disturbances, the H ∞ performance and disturbance-observer-based control (DOBC) are all considered in S-MJSs. The method which combines DOBC and H ∞ control is used to guarantee the system performance level of time-varying delay S-MJSs. Firstly, a sufficient condition of stochastic stability in the H ∞ performance level for the composite control system is given by using piecewise Lyapunov–Krasovskii functional. Secondly, the optimal value of disturbance suppression level for the system is solved by an optimisation algorithm. Thirdly, variation interval of time-delay has been divided into equal small intervals for reducing the conservatism of the method which addresses the mode-dependent time-delay problem. Furthermore, the composite controller and disturbance observer which satisfy the proposed stability condition are designed to address the composite anti-disturbance control problem of the closed-loop system. Finally, two practical systems are provided to testify the accuracy of research methods. |
| Starting Page | 1877 |
| Ending Page | 1887 |
| Page Count | 11 |
| ISSN | 17518644 |
| Volume Number | 14 |
| e-ISSN | 17518652 |
| Issue Number | Issue 14, Sep (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-cta/14/14 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2019.0833 |
| Journal | IET Control Theory & Applications |
| Publisher Date | 2020-05-07 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Algebra Antidisturbance Control Problem Closed Loop System Composite Antidisturbance Control Composite Control System Composite Controller Control System Analysis Control System Synthesis Delay Distributed Parameter Control System Disturbance Observer Disturbance Suppression Level Disturbance-observer-based System Generally Uncertain Transition Rates Linear Matrix Inequalities Lyapunov Method Markov Processes Mode-dependent Time-delay Problem Modelling And Identification Multiple Disturbances Nonlinear Control System Observers Optimal Control S-MJS SemiMarkovian Jump System Simulation Stability Stability in Control Theory Stochastic System Synthesis Method System Performance Level Time Varying Control System Time Varying System Time-varying Delay Uncertain System |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications |
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