Showing papers by "M Maarten Steinbuch published in 1996"

Robust and adaptive repetitive control

Abstract: 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 can not 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. For larger changes of the period-time a new self-tuning method is proposed, based on correlation analysis. Both the robust and the adaptive repetitive controller show good implementation results for a tracking control problem of a Compact Disc player.

Identification in view of control design of a CD player

Abstract: Electro mechanical servo systems as encountered in consumer electronic products have to keep pace with increasingly high performance demands As the me chanical construction is a restricting factor regarding the limits of achievable performance model based control design is proposed to enhance the bandwidth System identi cation proves to be an adequate tool to produce nominal models and uncertainty models that are suitable for control design purposes A method based on performing identi cation and control design in an iterative manner is proposed in order to systematically enhance the disturbance attenuation properties of a servo system The proposed method is exper imentally veri ed via application to a compact disc servo mechanism