摘要
在分析了常规刚性支撑非线性能量采集系统的研究基础上,提出外部磁铁弹性支撑的结构设想,保证系统在低强度激励条件下也能处于双稳态振荡,提高机电能量转换效率.研究表明,对于强度变化的随机激励历程,弹性支撑非线性能量采集系统不需要实时调整磁铁间距,能够更好地迎合强度时刻变化的随机激励源,实现高效的机电能量转换.
Based on the results of study on conventional rigid support nonlinear energy harvesters, in this paper, we conceive a kind of structure with an elastic-supported external magnet, for keeping the system in a state of bistable oscillation due to low-intensity excitations. Thus, an efficient electromechanical energy conversion can be accomplished. Studies show that the elastic-supported nonlinear energy harvesting systems do not need real-time adjustment of magnet spacings to meet varying-intensity random excitation vibrations. This structure helps to better satisfy the variable-intensity random excitation source, consequently it achieves efficiently electromechanical energy conversion.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第9期54-66,共13页
Acta Physica Sinica
基金
国家自然科学基金(批准号:51275336)
高等学校博士学科点专项科研基金(批准号:20120032110001)资助的课题~~
关键词
能量采集
双稳结构
压电悬臂梁
弹性支撑
energy harvesting
bistable oscillation
piezoelectric cantilever
elastic support
