FEA-based optimization and experimental verification of a typical flexure-based constant force module

Bingxiao Ding, Xuan Li (Corresponding Author), Yangmin Li (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


To solve the problem of insufficient constant-force stroke of the compliant constant force mechanism (CFM), a FEA-based optimization method based on structural parameters is proposed in this paper. Firstly, a flexure-based constant force module (FBCFM) combined with a Z-shaped beam and a bi-stable beam is designed. By analyzing the force-displacement relationship of the two kind beams, the architectural parameters related to the constant force characteristic of the FBCFM are derived. Then, the initial constant-force stroke with 2.2 mm and output constant force with 13.8 N of the FBCFM are obtained by experimental studies. Furthermore, to explore the parametric effects for the designed FBCFM, parametric evaluation is conducted via MATLAB. Finally, the optimal solution set of architecture parameters is obtained with FEA-based optimization method. Through experimental verification, the constant-force stroke of the optimized FBCFM is 4.5 mm with constant force 8.5 N. The optimization results show the effectiveness and feasibility of the proposed FEA-based optimization method.

Original languageEnglish
Article number113083
JournalSensors and Actuators A: Physical
Publication statusPublished - 1 Dec 2021


  • Bi-stable beam
  • Constant force compliant mechanism
  • FEA-based optimization
  • Z-shaped beam

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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