A retunable PID multi-rate controller for a networked control system

Authors:
Antonio Sala;Ángel Cuenca;Julián Salt
Affiliations:
System Engineering and Control Department, Instituto Universitario de Automática e Informática Industrial, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, S ...;System Engineering and Control Department, Instituto Universitario de Automática e Informática Industrial, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, S ...;System Engineering and Control Department, Instituto Universitario de Automática e Informática Industrial, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, S ...
Venue:
Information Sciences: an International Journal
Year:
2009

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Abstract

This paper introduces a control strategy based on retuning a multi-rate PID controller in accordance with the variable delays detected in a networked control system, in order to avoid a decreased control performance. The basic idea is minimising the first-order Taylor terms of a performance measure via gain scheduling, i.e., making the controller gains delay dependent. As network delay is time-variant, the stability of this control approach will be proved by means of linear matrix inequalities.