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弹性支撑双稳压电悬臂梁振动响应及能量采集研究
Studies on vibration resp onse and energy harvesting of elastic-supp orted bistable piezo electric cantilever b eams
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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。Abstract: 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.
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