Journal article
The system-matched hold and the intermittent control separation principle
P Gawthrop, L Wang
International Journal of Control | Published : 2011
Abstract
An intermittent controller is a form of hybrid controller which adds a generalised sample and hold mechanism to an underlying continuous-time feedback control system. The sampling may be non-uniform or event driven. One particular form of the hold, termed the system-matched hold (SMH) mimics the behaviour of the closed-loop feedback control signal during the intermittent intervals. It is shown in this article that this choice of hold leads to an intermittent separation principle. In particular, this simple analytical result ensures that when using the SMH, the separation properties of the underlying state-estimate feedback control system carry over to the intermittent control system. This se..
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Awarded by Leverhulme Trust
Funding Acknowledgements
Peter Gawthrop is a Leverhulme Emeritus Research Fellow and gratefully acknowledges the support of the Leverhulme Trust. Some of the ideas in this article were discussed with Prof. Peter Neilson and Professor Victor Solo whilst a Visiting Professorial Fellow in the Systems & Control Research Group the University of New South Wales and with Professor Liuping Wang whilst a Visiting Professor at RMIT University Melbourne. This work is also related to the linked EPSRC Grants EP/F068514/1, EP/F069022/1 and EP/F06974X/1 'Intermittent control of man and machine' and the author gratefully acknowledges the many discussions about intermittent control with Ian Loram, Martin Lakie and Henrik Gollee. Prof. Nathan van de Wouw made some helpful comments on an earlier version of this article. Anonymous reviewers made a number of important suggestions which substantially improved this article.