Robustness of VS‐MRAC with respect to unmodelled dynamics and external disturbances
作者:
Ramon R. Costa,
Liu Hsu,
期刊:
International Journal of Adaptive Control and Signal Processing
(WILEY Available online 1992)
卷期:
Volume 6,
issue 1
页码: 19-33
ISSN:0890-6327
年代: 1992
DOI:10.1002/acs.4480060103
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: Adaptive control;Variable structure control;Robustness;Unmodelled dynamics;Robustness of adaptive control
数据来源: WILEY
摘要:
AbstractA variable structure model reference adaptive controller (VS‐MRAC) using only input and output measurements was recently proposed and shown to be globally asymptotically stable with superior transient behaviour and disturbance rejection properties. In this paper a singular perturbation approach is used in order to establish the robustness of the controller in the presence of unmodelled dynamics (parasitics) and disturbances. We develop a new Lyapunov‐based technique to analyse the overall system and show that for sufficiently small parasitics the system remains stable and the output error is small in some se
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