NDLI: Design and analysis of an elastic mechanism with adjustable zero-to-infinite linear stiffness

Content Provider	IEEE Xplore Digital Library
Author	Tai-Hsun Wu Chao-Chieh Lan
Copyright Year	2015
Description	Author affiliation: Dept. of Mech. Eng., Kung Univ., Tainan, Taiwan (Tai-Hsun Wu; Chao-Chieh Lan)
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.
Sponsorship	IEEE Ind. Electron. Soc. (IES)
Starting Page	1084
Ending Page	1089
File Size	523303
Page Count	6
File Format	PDF
e-ISBN	9781467391078
DOI	10.1109/AIM.2015.7222684
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-07
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Springs Force Shape Stress Sensitivity Actuators Geometry compliant mechanism Variable stiffness passive compliance zero stiffness
Content Type	Text
Resource Type	Article

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