Nonlinear vibration energy generators with mechanical stops for low-frequency broadband applications

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Leistritz, B.^1,2 ; Toepfer, H.^1

Department of Advanced Electromagnetics, Technische Universität Ilmenau, Helmholzplatz 2, 98693 Ilmenau, Germany^1

Institut für Mikroelektronik- und Mechatronik-Systeme Gemeinnützige GmbH, Ehrenbergstraße 27, 98693 Ilmenau, Germany^2

关键词: Autonomous sensor systems;    Broadband applications;    Excitation frequency;    Low frequency range;    Maximum deflection;    Non-linear vibrations;    Nonlinear simulations;    Standard deviation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012050/pdf
DOI  :  10.1088/1742-6596/476/1/012050

来源: IOP

【 摘 要 】

A variety of energy-autonomous sensor systems are excited by a spectrum of excitation frequencies. Especially in the low-frequency range, an optimal system design is important because the available energy for conversion is relatively low. Because the maximum deflection for multimodal excitations is dependent on the stochastic phase, mechanical stops must be implemented to prevent an overloading of the springs. Due to the nonlinear effect of the mechanical stops, only an expected value of the mean output power can be specified. The standard deviation increases with the occurrence of contacts between the seismic mass and the stops. This paper presents a comparison between a linear approach and nonlinear simulations.