Design and analysis of a linear elastic mechanism with adjustable stiffness
ISBN (of the container)
9789860460988
Date Issued
2015
Author(s)
Wu, Taihsun
Abstract
A machine with variable internal stiffness can meet the performance requirement in different working environments. In the literature, linear variable-stiffness mechanisms (LVSMs) are rarer than those producing rotary motion. This paper presents an approach to design a linear variable-stiffness mechanism. 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. The merit of the proposed LVSM is that very small and very large stiffness can be simultaneously achieved in a compact space. To further reduce size and complexity, semi-circular 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)
14th International Federation for the Promotion of Mechanism and Machine Science World Congress, IFToMM 2015
Subjects
Compliant Mechanism
Passive Compliance
Variable Stiffness
Zero Stiffness
Compliant Mechanisms
Mechanisms
Adjustable Stiffness
Passive Compliance
Performance Requirements
Stiffness Variations
Variable Stiffness
Variable Stiffness Mechanism
Working Environment
Zero Stiffness
Stiffness
Publisher
National Taiwan University chienkai@caece.net
Description
14th International Federation for the Promotion of Mechanism and Machine Science World Congress, IFToMM 2015. Taipei. conference code:127160
Type
conference paper