Design of a motion energy harvester based on compliant mechanisms

a bi-stable frequency up-converter generator

Conference paper (2019)

Authors

T.W.A. Blad Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
D. Farhadi Machekposhti Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
J.L. Herder Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
N. Tolou Mechatronic Systems Design - Mechanical, Maritime and Materials Engineering
Research Group
Mechatronic Systems Design (Mechanical, Maritime and Materials Engineering) (TU Delft)
Nonlinear dynamics Compliant mechanisms Frequency up-conversion Bi-stability Motion energy harvesting
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Published Date

2019

Language

English

Reuse Rights

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Precision and Microsystems Engineering

Research Group

Mechatronic Systems Design

Abstract

This work presents a novel design, model and prototype of a motion energy harvester based on bi-stability and frequency up-conversion. The Parametric Frequency up-converter Generator (PFupCG). The PFupCG was designed to harvest energy under conditions where the amplitude of the driving motion is larger than the internal displacement limit. Instead of an impact member, the PFupCG uses a compliant suspension mechanism that combines a bi-stable characteristic with a strong stiffening behavior as a result of geometric effects. This resulted in a prototype of the PFupCG with an internal-to-applied motion amplitude ratio of 0.2. A case study was carried out where the PFupCG was analyzed by simulation and experiment for vibration conditions representative of human walking motion (2Hz, 25 mm).