Electrical Response Estimation of Vibratory Energy Harvesters via Hilbert Transform Based Stochastic Averaging
Publication: ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering
Volume 9, Issue 4
Abstract
Converting mechanical vibrations into electrical power with vibratory energy harvesters can ensure the portability, efficiency, and sustainability of electronic devices and batteries. Vibratory energy harvesters are typically modeled as nonlinear oscillators subject to random excitation, and their design requires a complete characterization of their probabilistic responses. However, simulation techniques such as Monte Carlo are computationally prohibitive when the accurate estimation of the response probability distribution is needed. Alternatively, approximate methods such as stochastic averaging can estimate the probabilistic response of such systems at a reduced computational cost. In this paper, the Hilbert transform based stochastic averaging is used to model the output voltage amplitude as a Markovian stochastic process with dynamics governed by a stochastic differential equation with nonlinear drift and diffusion terms. Moreover, the voltage amplitude dependent damping and stiffness terms are determined via an appropriate equivalent linearization, and the stationary probability distribution of the output voltage amplitude is obtained analytically by solving the corresponding Fokker–Plank equation. Two examples are used to demonstrate the accuracy of the obtained analytical probability distributions via comparisons with Monte Carlo simulation data. This article is available in the ASME Digital Collection at https://doi.org/10.1115/1.4062704.
Information & Authors
Information
Published In
Copyright
Copyright © 2023 by ASME.
History
Received: May 5, 2023
Revision received: May 31, 2023
Published online: Jun 30, 2023
Published in print: Dec 1, 2023
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.
Cited by
- Ketson R. M. dos Santos, João G. C. S. Duarte, Stochastic Response Determination of Hysteretic Vibratory Energy Harvesters with Fractional Derivatives via Stochastic Averaging, Journal of Engineering Mechanics, 10.1061/JENMDT.EMENG-7679, 150, 7, (2024).