Owing to the excitation level of ambient vibrations, the wideband performance of multi-stable energy harvesters and parametrically excited energy harvesters is restricted. The bistable periodic interwell motion and parametric resonance initial threshold amplitude primarily depend on the base excitation level. In this paper, a wideband two-element piezoelectric energy harvester with both bistability and parametric resonance characteristics is presented (i.e. designed, theoretically tested, fabricated and experimentally tested) to tackle the issue of reducing the potential barrier and triggering the parametric threshold amplitude. This device is the first to utilise a directly excited element as an external oscillation source to trigger the large amplitude oscillation of a parametrically excited element through magnetic coupling effects; the periodic interwell motion revealed in the parametrically excited device infers its bistability feature; and a continuously effective operational bandwidth (10–17.3 Hz) is achieved for both elements, which infers the high-energy orbit motions. Theoretical modelling of the proposed device and the expression of the magnetic coupling effects are presented to predict the dynamics of the system, as well as verifying the experimental results. The effects of the base excitation level and the gap distance between magnets are also analysed to shed light on the flexibilities and limitations of the device.

由于环境振动的激励水平，多稳态能量采集器和参量激励能量采集器的宽带性能受到限制。双稳态周期性井间运动和参数共振初始阈值幅度主要取决于基础激发水平。在本文中，提出了一种具有双稳态和参数谐振特性的宽带双元件压电能量收集器（即设计、理论测试、制造和实验测试），以解决降低势垒和触发参数阈值幅度的问题。该装置首次利用直接激励元件作为外部振荡源，通过磁耦合效应触发参量激励元件的大振幅振荡；参数激发装置中显示的周期性井间运动推断其双稳态特征；并且两个元素都实现了连续有效的操作带宽（10-17.3 Hz），这可以推断出高能轨道运动。提出了所提出设备的理论建模和磁耦合效应的表达，以预测系统的动力学，并验证实验结果。还分析了基础激励水平和磁铁之间的间​​隙距离的影响，以阐明设备的灵活性和局限性。提出了所提出设备的理论建模和磁耦合效应的表达，以预测系统的动力学，并验证实验结果。还分析了基础激励水平和磁铁之间的间​​隙距离的影响，以阐明设备的灵活性和局限性。提出了所提出设备的理论建模和磁耦合效应的表达，以预测系统的动力学，并验证实验结果。还分析了基础激励水平和磁铁之间的间​​隙距离的影响，以阐明设备的灵活性和局限性。