Robust Adaptive Control with Control Structure Modification for Aircraft
Publication: Journal of Aerospace Engineering
Volume 32, Issue 3
Abstract
Fast adaptation is commonly required in model reference adaptive control (MRAC) to handle uncertainties and achieve precise command tracking. High adaptive gain achieves fast adaption, and introduces high-frequency oscillation into the control signal. In this paper, we propose a robust compensator–based MRAC (R-MRAC) for an aircraft to tackle the problem of control signal high-frequency oscillation. First, the architecture of a standard MRAC with state augmentation is presented. Second, the control architecture is modified by introducing a robust compensator to guarantee transient performance of the closed-loop system. Finally, the proposed R-MRAC is applied to control the altitude of the aircraft with significant uncertainty in control effectiveness and aerodynamic coefficients. Numerical simulations results show that the proposed R-MRAC can effectively eliminate high-frequency oscillation.
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Published In
Journal of Aerospace Engineering
Volume 32 • Issue 3 • May 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 7, 2018
Accepted: Oct 24, 2018
Published online: Feb 27, 2019
Published in print: May 1, 2019
Discussion open until: Jul 27, 2019
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