Design of a linear variable-stiffness mechanism using preloaded bistable beams
Journal
IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
Start Page
605
End Page
610
ISSN
21596247
21596255
ISBN (of the container)
9781479957361
9781467325752
9781424412648
9781424480319
9781467391078
1424412641
9781509020652
9781424428533
0780377591
9798350355369
Date Issued
2014
Author(s)
Wu, Yi Syuan
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.
Event(s)
2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2014
Subjects
Bistable Beams
Compliant Mechanism
Passive Compliance
Variable Stiffness
Zero Stiffness
Compliant Mechanisms
Design
Intelligent Mechatronics
Mechanisms
Bistable Beam
Optimization Formulations
Passive Compliance
Performance Requirements
Stiffness Variations
Variable Stiffness
Working Environment
Zero Stiffness
Stiffness
Publisher
Institute of Electrical and Electronics Engineers Inc.
Description
2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2014. Besancon. conference code:107111
Type
conference paper