Hierarchical anti-disturbance adaptive control for non-linear systems with composite disturbances and applications to missile systems

• Published in: Transactions of the Institute of Measurement and Control Vol. 33; no. 8; pp. 942 - 956
• Main Authors: Guo, Lei, Wen, Xin-Yu
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.12.2011; Sage Publications Ltd
• Subjects: Adaptive control systems; Controllers; Disturbances; Dynamical systems; Error analysis; Mathematical models; Missile control; Missiles; Nonlinear dynamics; Nonlinear systems; Strategy; disturbance attenuation and rejection; disturbances observer; non-linear systems; adaptive control; anti-disturbance control
• ISSN: 0142-3312; 1477-0369
• DOI: 10.1177/0142331210361555

In this paper, a new anti-disturbance controller is presented for a class of non-linear systems with multiple disturbances. The first part of the disturbance is described by an exogenous model and the second part represents an uncertain variable bounded by a given function. A new non-linear disturbance observer is designed to estimate the composite disturbances. Then, a hierarchical control strategy consisting of disturbance-observer-based control and a robust adaptive controller is presented to achieve the anti-disturbance performance. A stability analysis for both the error estimation systems and the composite closed-loop system is provided. Finally, the approach is applied to a missile control system to show the efficiency of the approach.