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Energy harvesting of ambient vibrations using a combination of a mechanicalstructure (oscillator) and an electrical transducer has become a valuabletechnique for powering small wireless sensors. Bistable mechanical oscillatorshave recently attracted the attention of researchers as they can be used toharvest energy within a wider band of frequencies. In this manuscript, theresponse of a bistable harvester to different forms of ambient vibration isanalysed. In particular, harmonic noise, which has a narrow spectrum, similarlyto harmonic signals, yet is stochastic, like broad-spectrum white noise, isconsidered. Links between bistable harvester responses and stochastic andvibrational resonance are explored.

philosophical transactions - royal society. mathematical, physical and engineering sciences/philosophical transactions - royal society. mathematical, physical and engineering sciences

The response of a bistable energy harvester to different excitations: the harvesting efficiency and links with stochastic and vibrational resonances