NUMERICAL ANALYSES ON THE RESPONSES OF UNIMORPH AND BIMORPH PIEZOELECTRIC HARVESTERS IN TIME DOMAIN

The paper presents the assessment of electric output rendered by a unimorph and bimorph piezoelectric harvester, with one two active piezoceramic wafers, using numerical simulations. Expected sinusoidal voltages were obtained in time-dependent study, time step corresponding to eigenfrequency found after conducting an Eigenfrequency study. terminal agree Euler-Bernoulli beam theory distance layers from neutral fiber. By adding circuit node field problem form closed internal circuit, single unified voltage response should be obtained, coinciding input vibration signal. independent structure more than layer (usually or four) cannot observed experimentally, as harvester has only terminals that pick overall all layers, giving alternating output.