Journal
AUTOMATICA
Volume 38, Issue 12, Pages 2103-2109Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0005-1098(02)00134-6
Keywords
repetitive control; compact disc player; periodic disturbances; internal model principle
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Repetitive control is useful if periodic disturbances act on a control system. Perfect (asymptotic) disturbance rejection is achieved if the period-time is exactly known. For those cases where the period-time changes and cannot be measured directly by an auxiliary signal, a robust repetitive controller structure is proposed. It uses multiple memory-loops in a certain feedback configuration, such that small changes in period-time do not diminish the disturbance rejection properties. The robust repetitive controller shows good implementation results for a tracking control problem of a Compact Disc player. (C) 2002 Elsevier Science Ltd. All rights reserved.
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