Non-linear disturbance observer-based adaptive composite anti-disturbance control for non-linear systems with dynamic non-harmonic multisource disturbances

In this paper, an adaptive composite anti-disturbance control structure is constructed for a class of non-linear systems with dynamic non-harmonic multisource disturbances. The key point of this paper is that a kind of non-harmonic disturbance, which has non-linear internal dynamics and complex feat...

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Bibliographic Details
Published in:Transactions of the Institute of Measurement and Control 2018-08, Vol.40 (12), p.3458-3465
Main Authors: Wang, Zheng, Yuan, Jianping
Format: Article
Language:English
Subjects:
Adaptive control
Attenuation
Construction
Damping
Disturbance observers
Linear damping
Linear systems
Nonlinear control
Nonlinear systems
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Summary:In this paper, an adaptive composite anti-disturbance control structure is constructed for a class of non-linear systems with dynamic non-harmonic multisource disturbances. The key point of this paper is that a kind of non-harmonic disturbance, which has non-linear internal dynamics and complex features, is involved. A non-linear exogenous system is employed to describe the dynamic non-harmonic disturbances and several useful assumptions are introduced. By introducing a non-linear damping term, a novel adaptive non-linear disturbance observer is constructed. Based on the disturbance/uncertainty estimation and attenuation (DUEA) schemes, a composite anti-disturbance control structure is synthesized. Meanwhile, a new sufficient condition is derived and the stability of the closed-loop system is proved. Several illustrative examples are employed to demonstrate the effectiveness of the proposed method.
ISSN:0142-3312
1477-0369
DOI:10.1177/0142331217721967