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Robust control of nonlinear MAGLEV suspension system with mismatched uncertainties via DOBC approach
journal contribution
posted on 2023-06-08, 12:24 authored by Jun Yang, Argyrios Zolotas, Wen-Hua Chen, Konstantinos Michail, Shihua LiRobust control of a class of uncertain systems that have disturbances and uncertainties not satisfying “matching” condition is investigated in this paper via a disturbance observer based control (DOBC) approach. In the context of this paper, “matched” disturbances/uncertainties stand for the disturbances/uncertainties entering the system through the same channels as control inputs. By properly designing a disturbance compensation gain, a novel composite controller is proposed to counteract the “mismatched” lumped disturbances from the output channels. The proposed method significantly extends the applicability of the DOBC methods. Rigorous stability analysis of the closed-loop system with the proposed method is established under mild assumptions. The proposed method is applied to a nonlinear MAGnetic LEViation (MAGLEV) suspension system. Simulation shows that compared to the widely used integral control method, the proposed method provides significantly improved disturbance rejection and robustness against load variation.
History
Publication status
- Published
Journal
ISA TransactionsISSN
0019-0578Publisher
ElsevierExternal DOI
Issue
3Volume
50Page range
389-396Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-11-20Usage metrics
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