Abstract
High-polymer piezoelectric films are flexible sheet-like element and are attractive materials to construct super lightweight flexible structure in which sensor and actuator elements, and thus active damping abilities are contained in the structure itself. However, active multimodal vibration damping of flexible beams using distributed piezoelectric film sensors/actuators is difficult due to the interaction between structural system and electrical system, and so on. In this paper, a noncollocated vibration control method of a flexible beam, in which piezoelectric film sensors and actuators were shaped using different shaping functions, was investigated. Fundamental equations were summarized and were transformed into the modal space. By considering phase characteristics and polarity of the distributed control systems in high order modal frequencies, multimodal control will be implemented. Finally, preliminary results using a manufactured simply supported beam were shown.
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