Vibration Suppression of a Quadrilateral Plate Using Hybrid Piezoelectric Circuits

A practical method for suppressing random vibrations of a quadrilateral plate using the active/ passive hybrid piezoelectric circuits is developed. Firstly, the finite element model of the plate bonded with piezoelectric actuators is established by using the commercial software packages ANSYS®. Afterwards, matrices in these electromechanically coupled equations are directly imported into MATLAB® platform for later use. Time histories of the random excitations are obtained from the output of a band-pass FIR filter driven by white noise. Hybrid piezoelectric shunt circuits that combine the passive circuits with active voltage sources are used to suppress random vibrations of plate under the designed loads. Simulation results demonstrate that with appropriate circuit parameters, the hybrid control is more effective than passive or purely active control.

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