Yang, Jun, Zolotas, Argyrios, Chen, Wen-Hua , Michail, Konstantinos and Li, Shihua (2011) Robust control of nonlinear MAGLEV suspension system with mismatched uncertainties via DOBC approach. ISA Transactions, 50 (3). 389 - 396. ISSN 0019-0578
Full content URL: http://www.sciencedirect.com/science/article/pii/S...
Documents |
|
![]() |
PDF
__ddat02_staffhome_jpartridge_1-s2.0-S0019057811000073-main.pdf - Whole Document Restricted to Repository staff only 438kB |
Item Type: | Article |
---|---|
Item Status: | Live Archive |
Abstract
Robust 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.
Keywords: | Disturbance observer, Robustness, Uncertainty, Robust control, state space |
---|---|
Subjects: | H Engineering > H660 Control Systems H Engineering > H100 General Engineering |
Divisions: | College of Science > School of Engineering |
ID Code: | 15034 |
Deposited On: | 24 Sep 2014 10:12 |
Repository Staff Only: item control page