为提高压电振动俘能器的环境适应性，提出一种磁耦合式可调频压电振动俘能器，利用激励器上主动磁铁和组合换能器上被动磁铁间的耦合作用及横摆簧片实现压电振子的单向限幅激励。通过对俘能器及磁对的建模和仿真分析，获得了俘能器结构参数对俘能器输出性能的影响，在此基础上制作俘能器样机并进行实验研究，获得了俘能器纵摆质量m₁、横摆质量m₂、横向距离L_x、纵向距离L_y、竖向距离L_z及负载电阻对俘能器输出性能的影响规律。结果表明：存在两阶谐振频率f₁和f₂使输出电压出现峰值U_n1和U_n2，调节m₁，m₂，L_x，L_y及L_z会影响f₁，f₂，U_n1及U_n2；其他条件一定时，存在最佳负载电阻2 200 kΩ使输出功率达到0.122 mW。通过选择合适的结构参数能够提升俘能器的有效频带和输出电压，对增强压电振动俘能器的可靠性和频率适应性具有一定的参考价值。

To improve the environmental adaptability of a piezoelectric vibration energy harvester， a magnetically-coupled tunable piezoelectric vibration energy harvester （PVEH） is proposed. The coupling action between the active magnet on the actuator and the passive magnet on the combined transducer and transversal spring was used to realize the unidirectional limiting excitation of the piezoelectric vibrator. Through modeling and simulation analyses of the energy harvester and magnetic pair， influences of the structural parameters of the energy harvester on the corresponding output performance could be determined. On this basis， the energy harvester prototype was developed by selecting a better magnet diameter via experimental research. The influence laws of the energy harvester's longitudinal mass m₁， transversal mass m₂， transversal magnet spacing L_x， longitudinal magnet spacing L_y， vertical magnet spacing L_z， and load resistance on the output performance were also obtained. The results show that two order resonant frequencies f₁ and f₂ cause the output voltage to peak to U_n1 and U_n2， respectively. Moreover， adjusting m₁， m₂， L_x， L_y， and L_z will affect f₁， f₂， U_n1， and U_n2. Therefore， the effective frequency band and output voltage of the energy harvester can be increased when appropriate structural parameters are selected for the energy harvester. When other conditions are given， there is an optimal load resistance of 2 200 kΩ that increases the output power to 0.122 mW. Therefore， the effective frequency band and output voltage of the energy harvester can be improved by selecting suitable structural parameters and distance between magnets. The results provide good reference value for enhancing the reliability and frequency adaptability of the PVEH.