Design of a linear variable-stiffness mechanism using preloaded bistable beams

Yi Syuan Wu, Chao-Chieh Lan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A machine with variable internal stiffness can meet the performance requirement in different working environments. Linear variable-stiffness mechanisms (LVSM) are rarely found compared with those producing rotary motion. This paper presents an approach to design a linear variable-stiffness mechanism. The idea is to parallel connect two lateral bistable beams with a vertical spring. Through the preload adjustment of the bistable beams, the output force to displacement curve can exhibit different stiffnesses. The merit of the proposed LVSM is that very large stiffness variation can be achieved in a compact space. The stiffness may even be tuned to zero by assigning a proper stiffness to the vertical spring. An optimization formulation is presented to design a LVSM with the largest stiffness variation. The effects of various parameters on the stiffness variation and linearity are discussed. The results are numerically verified with a prototype illustrated.

Original languageEnglish
Title of host publicationAIM 2014 - IEEE/ASME International Conference on Advanced Intelligent Mechatronics
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages605-610
Number of pages6
ISBN (Print)9781479957361
DOIs
Publication statusPublished - 2014
Event2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2014 - Besancon, France
Duration: 2014 Jul 82014 Jul 11

Other

Other2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2014
CountryFrance
CityBesancon
Period14-07-0814-07-11

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Computer Science Applications
  • Software

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  • Cite this

    Wu, Y. S., & Lan, C-C. (2014). Design of a linear variable-stiffness mechanism using preloaded bistable beams. In AIM 2014 - IEEE/ASME International Conference on Advanced Intelligent Mechatronics (pp. 605-610). [6878145] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/AIM.2014.6878145