21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-4.11.2

OPTIMAL PLACEMENT OF PIEZOELECTRIC SENSORS AND ACTUATORS USING COMBINATORIAL OPTIMISATION

Cardascia L., Ruotolo R., Surace G.
Turin Polytechnical University, Italy

Keywords: piezoelectric sensors, actuators, optimisation

The purpose of this paper is to optimize the placement of n pairs of piezoelectric sensors and actuators with a view to reducing vibration of a composite beam. Using the Reissner-Mindlin model to describe beam behaviour, both sensor and actuator are considered as layers of composite material. The position and length of each sensor actuator pair is determined by applying genetic algorithms to maximize a function including the product of damping ratio by natural frequency in each mode. Some numerical simulations, which through comparison with experimental results show the importance of an accurate damping model due to the layer of adhesive and to piezoelectric patches, complete the work.

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