Minimax Robust Jerk Limited Control of Flexible Structures

نویسنده

  • Marco Muenchhof
چکیده

This paper is concerned with the design of robust jerk limited controllers for flexible structures. In order to eliminate residual vibration at the end of the maneuver, a time-delay filter, forming the command input, is used. A minimax optimization scheme is employed to make the controller more robust with respect to parametric uncertainties. The degree of robustness can be chosen arbitrarily. The minimax setting permits for the easy inclusion of statistical information concerning these parametric uncertainties. The controller design accounts for both limits in the magnitude as well as the timerate of change of the control input. Among other benefits, this class of control sequences shows a favorable frequency spectrum compared with the jerk unconstrained sequences. The method is illustrated on the undamped as well as the damped Floating Oscillator benchmark problem. Résumé: Cet article traite la conception de contrôleurs robustes et anti-secousse pour des structures flexibles. Afin d’ éliminer les vibrations résiduelles en fin de manœuvre, un filtre à retard de temps, formant la commande, est utilisé. Un arrangement d’optimisation min-max est employé pour rendre le contrôleur moins sensibles aux incertitudes paramétriques. Le degré de robustesse peut être choisi arbitrairement. La formule en problême d’optimisation min-max permet l’inclusion facile d’informations statistiques sur ces incertitudes paramétriques. La conception de ce contrôleur tient compte non seulement des limites dans la taille mais aussi du temps-cadence du changement de commande. En plus d’autres advantages cette classe de commandè montre un spectre de fréquence plus favorable comparé aux classes de commande non limités en secousse. La méthode s’applique sur le problème de référence, un système de deux-masses-ressortet-amortisseur, l’ oscillateur flottant.

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تاریخ انتشار 2002