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- W1999156975 abstract "We present a low frequency vibration driven 2-DOF piezoelectric energy harvester with increased performance, in terms of both bandwidth and output power, by mechanical impact. It consists of two series spring-mass systems (positioned in a parallel manner) one of which responds to low frequency vibration, engages with the harvester base stopper periodically by piecewise linear impact, and transfers a secondary shock to the second spring- mass system comprising of power generating element. It introduces a non-linear frequency up- conversion mechanism which, in turn, generates increased output power within a wide range of applied frequency. A 2-DOF prototype harvester without stopper shows two narrow resonant peaks and delivers maximum 2.11μW peak power to its matched load resistance at 17Hz frequency and 0.5g acceleration. On the other hand, it offers a -3dB bandwidth of 15Hz (9Hz- 24Hz) and delivers maximum 202.4μW peak power to its matched load resistance at the same operating condition when a stopper is placed below the primary mass at 0.5mm distance. Generated power increases up to 449μW as the acceleration increases to 1g." @default.
- W1999156975 created "2016-06-24" @default.
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- W1999156975 date "2014-11-27" @default.
- W1999156975 modified "2023-09-24" @default.
- W1999156975 title "Performance enhancement of a low frequency vibration driven 2-DOF piezoelectric energy harvester by mechanical impact" @default.
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- W1999156975 doi "https://doi.org/10.1088/1742-6596/557/1/012093" @default.
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