Tuning the Dynamics of Bistable Mechanisms by Introducing Travel Limits

Kylian van Puffelen, Thijs W.A. Blad, Ron van Ostayen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Vibrations are a promising source for powering wireless sensors, for example in low-frequency environments like human motion. These environments suffer from unpredictable vibration spectra and their low-frequency and large amplitude characteristics offer great possibilities for mechanisms with double well potential energy characteristics. The dynamical output performance of a bistable mechanism depends on the oscillation in the large amplitude trajectory between the two potential wells. However, requires enough force to overcome potential energy barrier. This work aims to improve the occurrence of interwell oscillation by lowering the potential energy barrier between the two potential wells by the influence of hard mechanical travel limits. A bistable mechanism is numerically modelled and experimentally tested to investigate the influence of the mechanical travel limits for low-frequency excitations. An axial loaded buckling beam was used to introduce bistability and combined with a parallel guidance mechanism to compensate for the strong negative stiffness. A single-degree of freedom model is used to model the bistable characteristics and is expanded with a coefficient of restitution model to represent the mechanical characterization of the travel limits. This combination resulted in a decrease in required force for the oscillation in the desired large amplitude trajectory by constraining the oscillator motion with travel limits. Furthermore, the results from the numerical bistable model in combination with mechanical characteristics of the travel limits at impact, proves to be in good agreement with the experimentally obtained results.

Original languageEnglish
Title of host publicationAdvances in Mechanism Design III
Subtitle of host publicationProceedings of TMM 2020
EditorsJaroslav Beran, Martin Bílek, Miroslav Václavík, Petr Žabka
Place of PublicationCham, Switzerland
PublisherSpringer
Pages134-143
ISBN (Electronic)978-3-030-83594-1
ISBN (Print)978-3-030-83593-4
DOIs
Publication statusPublished - 2022
Event13th International Conference on the Theory of Machines and Mechanisms, TMM 2020 - Liberec, Czech Republic
Duration: 7 Sep 20219 Sep 2021

Publication series

NameMechanisms and Machine Science
Volume85
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992

Conference

Conference13th International Conference on the Theory of Machines and Mechanisms, TMM 2020
CountryCzech Republic
CityLiberec
Period7/09/219/09/21

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care

Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Bistability
  • Coefficient of restitution
  • Impact
  • Low-frequency
  • Mechanical travel limits
  • Vibration energy harvesting

Fingerprint

Dive into the research topics of 'Tuning the Dynamics of Bistable Mechanisms by Introducing Travel Limits'. Together they form a unique fingerprint.

Cite this