环境动能收集器频率自调节技术研究进展

环境动能收集器的工作频带窄,导致其难以与频率随机变化的环境激励相匹配而制约其实用化。基于频率自调节技术的频率匹配方法具有频率匹配范围宽、精度高、无需人工干预等优点,是解决该问题的有效技术方案之一。根据近年来国内外该类技术研究进展,首先从频率自调节原理、实现方法和具体实现等方面对振动激励和转动激励下的频率自调节技术进行了总结;然后介绍了基于频率自调节技术与非线性技术结合的频率匹配方法的研究进展。最后,对比分析了不同频率自调节方法的优缺点,总结归纳了频率自调节技术的发展方向。

Review of Frequency Self-Tuning Technology for Ambient Kinetic Energy Harvester

The working frequency band of the ambient kinetic energy harvester (KEH) is narrow, so it is difficult to match with the ambient excitation whose frequency is random, thus restricting practicality. The frequency matching method based on frequency self-tuning technology has the advantages of wide frequency matching range, high frequency matching accuracy, and no manual intervention, which is one of the effective technical solutions to solve this problem. By reviewing the home and abroad research progress in recent years, the frequency self-tuning technologies, realization method and specific realization under vibration excitation and rotation excitation were summarized from the principle. Then, the research progress of frequency matching methods based on the combination of frequency self-tuning technology and nonlinear technology were introduced. Finally, the advantages and disadvantages of different frequency self-tuning methods were compared, and the development direction of frequency self-tuning technology was summarized.