On the Efficiency Enhancement of an Actively Tunable MEMS Energy Harvesting Device
نویسندگان
چکیده
In this paper, we propose an active control method to adjust the resonance frequency of a capacitive energy harvester. To end, harvester is tuned using electrostatic force, which actively controlled by voltage source. The spring softening effect force used accommodate dominant ambient mechanical vibration within bandwidth region. A single degree freedom considered, and nonlinear equation motion numerically integrated over time. Using conventional proportional–integral–derivative (PID) mechanism, results demonstrated that our controller could shift leftward on domain and, as result, improve efficiency harvester, provided excitation lower than Application PID in zone resulted pull-in instability, adversely affecting harvester’s performance. tackle problem, embedded saturation mechanism path signal prevent sudden change amplitude. Outside band, reduction harvested power compared non-saturated signal; promising improvement design analysis harvesting devices.
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ژورنال
عنوان ژورنال: Vibration
سال: 2022
ISSN: ['2571-631X']
DOI: https://doi.org/10.3390/vibration5030035