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S5 Controle Ativo de Vibrações e Estruturas Inteligentes |
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Title:
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INFLUENCE OF MODAL PARAMETERS UNCERTAINTIES ON THE ACTIVE CONTROL OF AN ELASTIC STRUCTURE
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Summary :
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ABSTRACT. THE OBJECTIVE OF THIS PAPER IS TO ANALYZE THE INFLUENCE OF UNCERTAINTIES IN THE VALUES OF MODAL PARAMETERS ON THE ACTIVE CONTROL OF AN ELASTIC STRUCTURE. RANDOM VARIATIONS ARE APPLIED TO THE CORRECT VALUES OF NATURAL FREQUENCIES, DAMPING RATIOS AND MODAL SHAPES OF THE STRUCTURE, AND THE RESULTING EFFECTS ON THE PERFORMANCE OF THE CONTROL SYSTEM ARE STUDIED. THE STRUCTURE IS ASSUMED TO PRESENT PROPORTIONAL DAMPING. THE CONTROL IS APPLIED INDEPENDENTLY TO A FEW MODES, UNDER A DISCRETE-TIME SCHEME. THE ACTUATORS ARE ONLY LINKED TO POINTS WITHIN THE STRUCTURE, THUS PROVIDING "INTERNAL CONTROL FORCES". COMPUTER SIMULATION RESULTS ARE PRESENTED AND DISCUSSED.
KEY-WORDS: ACTIVE CONTROL, VIBRATIONS, ELASTIC STRUCTURE
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Author :
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Arruda, José R. F.
Jordan, Roberto
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Paper View :
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