Nonlinear forces have been widely introduced into vibration energy harvesting to improve its performance. Generally, sources of nonlinearity include magnet forces, spring forces, geometric and material nonlinearity, etc. However, these nonlinear forces cannot be manipulated arbitrarily. It is very promising if the nonlinear forces can be customized according to requirements, in which the performance of the energy harvester can be further optimized. Therefore, the purpose of this study is to develop a kind of vibration energy harvester (VEH) that can customize the nonlinear forces. The nonlinear force customization device consists of a pre-compressed spring, a miniature bearing, and a raceway, which are designed according to the nonlinear forces. As an example, the device is installed at the end of a piezoelectric cantilever beam, and mono-stable, bi-stable and tri-stable energy harvesters are customized, respectively. Simulation and experiments prove its effectiveness. The nonlinear force customization device enables designers to obtain the desirable nonlinear forces for the vibration energy harvesters.

非线性力已被广泛引入振动能量收集中以改善其性能。通常，非线性源包括磁力，弹簧力，几何和材料非线性等。但是，这些非线性力不能任意操纵。如果可以根据需要定制非线性力，这将是一个非常有希望的事情，其中​​可以进一步优化能量收集器的性能。因此，本研究的目的是开发一种可以定制非线性力的振动能量收集器（VEH）。非线性力定制装置由预压缩弹簧，微型轴承和滚道组成，它们是根据非线性力设计的。例如，该设备安装在压电悬臂梁的末端，并且是单稳态的，分别定制了双稳态和三稳态能量收集器。仿真和实验证明了其有效性。非线性力定制设备使设计人员能够获得振动能量收集器所需的非线性力。