A spring-mass-lever model, stiffness and inertia maps for single-input, single-output compliant mechanisms

Hegde, Sudarshan and Ananthasuresh, GK (2012) A spring-mass-lever model, stiffness and inertia maps for single-input, single-output compliant mechanisms. In: MECHANISM AND MACHINE THEORY, 58 . pp. 101-119.

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Abstract

A spring-mass-lever (SML) model is introduced in this paper for a single-input-single-output compliant mechanism to capture its static and dynamic behavior. The SML model is a reduced-order model, and its five parameters provide physical insight and quantify the stiffness and inertia(1) at the input and output ports as well as the transformation of force and displacement between the input and output. The model parameters can be determined with reasonable accuracy without performing dynamic or modal analysis. The paper describes two uses of the SML model: computationally efficient analysis of a system of which the compliant mechanism is a part; and design of compliant mechanisms for the given user-specifications. During design, the SML model enables determining the feasible parameter space of user-specified requirements, assessing the suitability of a compliant mechanism to meet the user-specifications and also selecting and/or re-designing compliant mechanisms from an existing database. Manufacturing constraints, material choice, and other practical considerations are incorporated into this methodology. A micromachined accelerometer and a valve mechanism are used as examples to show the effectiveness of the SML model in analysis and design. (C) 2012 Published by Elsevier Ltd.

Item Type:	Journal Article
Publication:	MECHANISM AND MACHINE THEORY
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright for this article belongs to Elsevier
Keywords:	Compliant mechanisms; Spring-leverage model; Selection map
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	07 Jan 2013 10:28
Last Modified:	07 Jan 2013 10:28
URI:	http://eprints.iisc.ac.in/id/eprint/45335

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