Vibration control of a cable structure via a flexible piezoelectric damper and energy harvesting

A piezoelectric damper has been designed to control the vibration of a straight single cable structure, tuned with the shunt circuits. The optimal placement of the damper, and optimization of geometrical and mechanical parameters have been described. The control procedure and performance of the damper in terms of longitudinal and transversal vibrations are presented. It is noticed that the LR and NC-R shunts show remarkable suppression of vibrations. An energy harvester has also been designed and the energy has been harvested from the structure as electric power. The harvester has been analyzed in terms of frequency, electric load resistance, and acceleration dependence. The amount of energy extracted from the PVDF energy harvester is low as the input mechanical energy is low due to the hardness of the flexible cable to transfer deformation to the piezoelectric tube and the dissipation of energy through the circuit.

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