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Authors: L. Yang ; S. A. Neild and D. J. Wagg

Affiliation: University of Bristol, United Kingdom

Keyword(s): Model reference adaptive control, Robustness, Unmodelled dynamics, Frequency response technique.

Related Ontology Subjects/Areas/Topics: Adaptive Signal Processing and Control ; Informatics in Control, Automation and Robotics ; Signal Processing, Sensors, Systems Modeling and Control

Abstract: In this paper we develop a modified MRAC strategy for use on plants with unmodelled high frequency dynamics. The MRAC strategy is made up of two parts, an adaptive control part and a fixed gain control part. The adaptive algorithm uses a combination of low and high pass filters such that the frequency range for the adaptive part of the strategy is limited. This reduces adaptation to unexpected high frequency dynamics and removes low frequency gain wind-up. In this paper we consider two examples of plants with unmodelled high frequency dynamics, both of which exhibit unstable behaviour when controlled using the standard MRAC strategy. By using the modified strategy we demonstrate that robustness is significantly improved.

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Paper citation in several formats:
Yang, L.; A. Neild, S. and J. Wagg, D. (2007). MODIFIED MODEL REFERENCE ADAPTIVE CONTROL FOR PLANTS WITH UNMODELLED HIGH FREQUENCY DYNAMICS. In Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO; ISBN 978-972-8865-84-9; ISSN 2184-2809, SciTePress, pages 196-201. DOI: 10.5220/0001617101960201

@conference{icinco07,
author={L. Yang. and S. {A. Neild}. and D. {J. Wagg}.},
title={MODIFIED MODEL REFERENCE ADAPTIVE CONTROL FOR PLANTS WITH UNMODELLED HIGH FREQUENCY DYNAMICS},
booktitle={Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO},
year={2007},
pages={196-201},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001617101960201},
isbn={978-972-8865-84-9},
issn={2184-2809},
}

TY - CONF

JO - Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO
TI - MODIFIED MODEL REFERENCE ADAPTIVE CONTROL FOR PLANTS WITH UNMODELLED HIGH FREQUENCY DYNAMICS
SN - 978-972-8865-84-9
IS - 2184-2809
AU - Yang, L.
AU - A. Neild, S.
AU - J. Wagg, D.
PY - 2007
SP - 196
EP - 201
DO - 10.5220/0001617101960201
PB - SciTePress