摘要
电磁式振动能量捕获技术从单稳态系统发展到多稳态系统,拓宽了响应频带,增大了输出电压,能够获得较好的发电性能.以附加线性振子的双稳态电磁式振动能量捕获器为研究对象,主要研究了势阱深度对双稳态系统发电性能的影响,并基于最优发电性能下的势阱深度,研究了双稳态系统结构参数中质量比与调频比对系统发电性能的影响.通过数值仿真结果说明,在外部激励频率为低频时:势阱深度较大时,双稳态系统的振子只能在一个阱内发生小幅振动运动;当势阱深度小到一定程度时,双稳态系统的振子跨过势垒在两个阱间内发生大幅混沌运动或周期运动,其优于小幅振动运动时的平均输出功率.通过数值模拟,得到双稳态系统具有较高的发电性能下的最优质量比、调频比以及阻尼比参数.
With the development of the electromagnetic vibration energy harvesting technology from single-to multi-stable-state systems, the response frequency bandwidth was broadened and the output voltage was increased, hence better power generation performance was obtained. The bistable electromagnetic vibration energy harvester with a linear vibrator was investigated, the effects of potential well depth on the power generation performance was studied, and the influences of the system structure parameters of the mass ratio and the tuning ratio were analyzed based on the potential well depth under the optimal power performance. Numerical simulation results show that, when the external excitation is at low frequencies, the potential well depth will be larger, and the vibrator of the bistable system can only work in small vibration; when the potential well depth is small to a certain extent, the vibrator will enter large chaotic or periodic motion across the barrier between 2 potential wells, with the average output power higher than that during the small motion. Through numerical simulation, the optimal mass ratio, tuning ratio and damping ratio of the system were obtained.
作者
张小静
刘丽兰
任博林
李淑超
ZHANG Xiao-jing LIU Li-lan REN Bo-lin LI Shu-chao(School of Mechanical and Precision Instrument Engineering, Xi＇ an University of Technology, Xi＇ an 710048, P.R. China)
出处
《应用数学和力学》
CSCD
北大核心
2017年第6期622-632,共11页
Applied Mathematics and Mechanics
基金
国家自然科学基金(11572243)~~
关键词
双稳态系统
势阱深度
质量比
调频比
平均输出功率
bistable system
potential well depth
mass ratio
tuning ratio
average output power
