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Vol. 119, Issue 8, August 2010, pp.1-13

 

Bullet

 

Fully Decoupled Compliant Parallel Mechanism: a New Solution for the Design of Multidimensional Accelerometer

 

Zhen GAO and Dan ZHANG

Faculty of Engineering and Applied Science,

University of Ontario Institute of Technology, Oshawa, Ontario, L1H 7K4 Canada

Tel.: 1-905-721-8668 ext. 3504, fax: 1-905-721-3370

E-mail: Zhen.Gao@uoit.ca

 

 

Received: 26 June 2010   /Accepted: 17 August 2010   /Published: 31 August 2010

 

Abstract: In this paper, a novel multidimensional accelerometer is proposed based on fully decoupled compliant parallel mechanism. Three separated chains, which are served as the elastic body, are perpendicular to each other for sensing the kinetic information in different directions without decoupling process. As the crucial part of the whole sensor structure, the revolute and prismatic joints in three pairwise orthogonal branches of the parallel mechanism are manufactured with the alloy aluminium as flexure hinge-based compliant joints. The structure development is first introduced, followed by the comprehensive finite-element analysis including the strain of the sensitive legs, modal analysis for total deformation under different frequency, and the performance of harmonic response. Then, the shape optimization is conducted to reduce the unnecessary parts. Compliance optimization with particle swarm algorithm is implemented to redesign the dimension of the sensitive legs. The research supplies a new viewpoint for the mechanical design of physical sensor, especially acceleration sensor.

 

Keywords: Compliant parallel mechanism, Multidimensional accelerometer, Flexure hinge, Particle swarm optimization

 

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