Design and analysis of an elastic mechanism with adjustable zero-to-infinite linear stiffness
Journal
IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
Journal Volume
2015-August
Start Page
1084
End Page
1089
ISSN
21596247
21596255
ISBN (of the container)
9781479957361
9781467325752
9781424412648
9781424480319
9781467391078
1424412641
9781509020652
9781424428533
0780377591
9798350355369
Date Issued
2015
Author(s)
Wu, Taihsun
Abstract
A machine with large output stiffness variation can meet the requirement in different working environments. This paper presents an approach to design a linear variable-stiffness mechanism (LVSM) with adjustable zero-to-infinite stiffness. The idea is to use circular slots to adjust the initial rotation of two parallel connected springs. The output force to displacement curve can exhibit zero to very large stiffness depending on the rotation of the springs. Infinite stiffness is achieved by using mechanical stoppers to constrain the displacements of the springs. The merit of the proposed LVSM is that zero and infinite stiffness can be simultaneously achieved in a compact space. To further reduce size and complexity, specifically designed planar springs are proposed to replace commercially available coil springs. Force and stiffness analyses are presented to design a LVSM with the largest stiffness variation. The effects of various parameters on the stiffness variation are discussed. The results are numerically verified with a prototype illustrated.
Event(s)
IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2015
Subjects
Compliant Mechanism
Passive Compliance
Variable Stiffness
Zero Stiffness
Compliant Mechanisms
Intelligent Mechatronics
Mechanisms
Design And Analysis
Passive Compliance
Stiffness Analysis
Stiffness Variations
Variable Stiffness
Variable Stiffness Mechanism
Working Environment
Zero Stiffness
Stiffness
Publisher
Institute of Electrical and Electronics Engineers Inc.
Description
IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2015. Busan; BEXCO. conference code:117136
Type
conference paper