Improvement of micro-jitter energy harvesting efficiency of piezoelectric-based surge-inducing optimal switching strategy

Micro-jitter is regarded as a primary source of image-quality degradation for high-resolution observation satellites. To comply with the strict mission requirements of high-quality image acquisitions, most technical efforts have been directed toward isolating the micro-jitter disturbances. However, in this study, we focused on the feasibility of utilizing the micro-jitter as a piezoelectric-based energy-harvesting target. To harvest the micro-scale jitter effectively, a switching strategy that intentionally induces a surge phenomenon was applied. The surge phenomenon was induced by a sudden current transition in the inductor, right after the switching action, such that the piezo-induced voltage can be significantly boosted. This switching strategy was suitable for the micro-jitter energy harvesting and was further enhanced by adopting an optimal switching duration. The effectiveness of the proposed piezoelectric-based surge-inducing optimal switching strategy was demonstrated through incorporating numerical simulation and experiments.