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Proceedings Paper

Optimal sizes and placements of piezoelectric actuators and sensors on an inflated torus
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Paper Abstract

One of the limitations of a piezoelectric material is the amount of force it can exert. Hence, it is important to optimize the locations and sizes of the actuators so that the required control effort is minimum. Similarly, to obtain good signal to noise ratio, sensors should be chosen to provide maximum output for the vibration in the modes of interest. These problems become more critical as the number of actuators and sensors increases. In this study, we find optimum places and sizes of actuators/sensors on an inflated toroidal shell using genetic algorithm. Using the expressions for the generalized forces and sensor voltages developed previously, modal forces and modal sensing constants are determined. To obtain a cumulative performance measure of all the controlled modes, controllability and observability indices are used. Using these performance indices, optimal locations and sizes of the actuators and sensors are determined so that the actuators require minimum energy and the sensors provides maximum output energy. Finally, using an optimal control, the vibration suppression of the inflated torus using these actuators and sensors has been demonstrated.

Paper Details

Date Published: 15 July 2002
PDF: 12 pages
Proc. SPIE 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems, (15 July 2002); doi: 10.1117/12.474697
Show Author Affiliations
Akhilesh K. Jha, Virginia Polytechnic Institute and State Univ. (United States)
Daniel J. Inman, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 4701:
Smart Structures and Materials 2002: Smart Structures and Integrated Systems
L. Porter Davis, Editor(s)

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