دانلود مقاله ISI انگلیسی شماره 132752
کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
132752 2018 12 صفحه PDF سفارش دهید 8648 کلمه
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عنوان انگلیسی
A packet-based dual-rate PID control strategy for a slow-rate sensing Networked Control System
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : ISA Transactions, Volume 76, May 2018, Pages 155-166

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چکیده انگلیسی

This paper introduces a packet-based dual-rate control strategy to face time-varying network-induced delays, packet dropouts and packet disorder in a Networked Control System. Slow-rate sensing enables to achieve energy saving and to avoid packet disorder. Fast-rate actuation makes reaching the desired control performance possible. The dual-rate PID controller is split into two parts: a slow-rate PI controller located at the remote side (with no permanent communication to the plant) and a fast-rate PD controller located at the local side. The remote side also includes a prediction stage in order to generate the packet of future, estimated slow-rate control actions. These actions are sent to the local side and converted to fast-rate ones to be used when a packet does not arrive at this side due to the network-induced delay or due to occurring dropouts. The proposed control solution is able to approximately reach the nominal (no-delay, no-dropout) performance despite the existence of time-varying delays and packet dropouts. Control system stability is ensured in terms of probabilistic Linear Matrix Inequalities (LMIs). Via real-time control for a Cartesian robot, results clearly reveal the superiority of the control solution compared to a previous proposal by authors.

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