Experimental and theoretical studies on piezoelectric energy harvesting from low-frequency ambient random vibrations

摘要: In this paper, an analytical approach was used to formulate for gathering energy from ambient sources of vibrations. The apparatus consists a cantilevered beam harvester with piezoelectric patch. A coupled electromechanical modal model based on Euler–Bernoulli theory is used. governing equations were extracted using Hamilton’s principle and then discretized by the Rayleigh–Ritz approach. expected value electrical power output obtained weakly stationary, Gaussian bandpass zero mean base excitation. Next, numerical solution under band-limited random acceleration as input calculated validated experiment. results closely correlated experimental data deviation about 10%.