Motion amplification using a flextensional compliant mechanism for enhanced energy harvesting

摘要: In vibration-based energy harvesting, ambient vibration often occurs in such small amplitudes that it cannot be used to drive electrical generators directly. To maximize the amount of output power, input motion is usually amplified before being for power generation. This work presents a non-resonant piezoelectric harvester relies on compliant mechanism amplify given persistent order enhance output. The device can situations where cyclic relative between two surfaces, and fitted extract energy. use mechanism, as opposed conventional gear drives or linkages, alleviates problems excessive clearances, friction losses. A finite element model developed investigate effect various design parameters system performance terms amplification ratio, stiffness voltage. Findings present are verified both numerically experimentally cam-driven polymer mechanism. parametric study conducted most influential variables an attempt optimize maximum magnetically bistable beam, driven by finally presented provides substantially greater amounts power.