中文摘要：

介绍了利用非线性来提高磁致伸缩能量采集系统效率的原理，建立了双稳态磁致伸缩能量采集器的集中参数模型，给出了两磁体之间的磁力数学表达式并验证了其正确性。分析了磁体之间的距离对系统特性的影响，结果表明：在外部非线性磁力的作用以及合适的磁体间距下，磁致伸缩悬臂梁会构成一个双稳态系统；相同激励幅值下，通过改变激励频率和磁体间距形成双稳态特性，可提高能量的采集效率。

英文摘要：

Introduction was made to the principle using the nonlinear to improve the efficiency of the magnetostrictive energy harvesting system. This paper established a lumped parameter model of bi-stable magnetostrictive energy harvester, gave the magnetic force mathematical expressions between two magnetic bodies and verified their correctness. This paper analyzed the impacts of the distance between the magnets on the system characteristics. The results show that in the nonlinear effect of external magnetic and suitable magnet spacing, themagnetostrictive cantilever would constitute a bi-stable system, and under the same excitation amplitude, the excitation frequency and magnet spacing were changed to form bi-stable state characteristic, which could improve the efficiency of energy harvesting.