中文摘要：

以外加磁场压电悬臂梁能量采集系统结构为研究对象，根据磁化电流方法探讨了具有悬臂梁特征的系统结构的磁场作用力及其计算方法，给出了相应的磁力计算模型，并将计算结果与实验数据进行了对比．研究表明，磁化电流方法导出的磁力计算模型存在偏差，其磁力计算误差随着磁铁间距缩小而增大．通过引入悬臂梁末端磁铁的偏转角度，对磁化电流法计算模型进行改进，得到合理的外加磁场压电悬臂梁能量采集系统的磁力计算模型，为该能量采集系统的进一步研究提供了可靠的磁力计算理论依据．

英文摘要：

This paper focuses on the piezoelectric cantilever energy harvesting system with an externally applied magnetic field. The calculation method and model for the magnetic force are proposed from the magnetizing current method, and the calculation results are compared with a set of experimental data. The study shows that there is a deviation in the calculation model derived by the magnetizing current method, which increases as the distance between two magnets decreases. The calculation model is improved by introducing the deflection angle of the magnet at the end of the cantilever beam, and is reliable to calculate the magnetic force of piezoelectric cantilever energy harvesting system with an externally applied magnetic field for further studying this energy harvesting system.