摘要：为了预测振动发电机的响应规律，采用弹簧-质量-阻尼构建系统模型，并结合电磁感应定律，分析输入振动位移与系统响应的耦合规律。磁场分布和磁力采用有限元法计算，在机电耦合仿真过程中将磁力采用三次多项式拟合，确定系数可达09976。正弦振动激励下的计算结果表明，由于磁力的非线性，动子位移和输出电动势出现了明显的谐波。在振幅和频率分别为5 mm和10 Hz的正弦振动激励下对样机进行测试，输出电动势的峰峰值和有效值分别为3 V和07 V。实验结果与仿真结果规律一致。
关键词：振动；机电耦合；永磁；能量采集；系统模型
Abstract: The system model was constructed used the springmassdamper structure in order to predict the response regularity of the vibration generator. The coupling rule about the input vibration and system responses can be analyzed based on the system model and faraday's law. Magnetic field distribution and magnetic force were calculated by the finite element method. Magnetic force is fit by cubic polynomial for the electromechanical coupling analysis, and coefficient of determination is up to 09976. Simulation results show that the mover's displacement and output EMF have obvious harmonic due to the nonlinear magnetic force. A prototype was tested under the sinusoidal vibration with amplitude 5 mm and frequency 10 Hz. The peaktopeak value and the effective value of output EMF are 3 V and 07 V, respectively. The experimental results are consistent with the simulation results.
Key words: vibration；electromechanical coupling；permanent magnet；energy harvesting；system model