基于双稳态的振动能量收集系统的设计

摘要

An energy harvester was designed by permanent magnets,a cantilever beam,piezoelec-tric material and so on,and the influence factors were studied experimentally and theoretically herein. The conclusion is made that the system has a bistable behavior under the suitable magnetic distance, which broadens the range of frequency response and increases the response amplitude,and the nonlin-ear bistable system has a higher efficiency of energy harvesting than that of a linear system under the suitable excitation amplitude and excitation frequency.%利用外部永磁铁、悬臂梁和压电材料等构成了能量收集系统，并对该系统的影响因素进行了理论与实验探究。结果发现：只有在合适的磁铁距离下，系统才具有双稳态特性，而且这种特性拓宽了系统的频率响应范围，使系统获得更大的响应幅值。只有在适当的激励幅值和激励频率下，该非线性系统才能获得比线性系统更高的能量俘获效率。