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Stiffness Design, Analysis and Validation of a Parallel-Mechanism Equivalent Suspension System

[+] Author Affiliations
Chen Qiu, Ketao Zhang, Jian S. Dai

King’s College London, London, UK

Jing Shan Zhao

Tsinghua University, Beijing, China

Paper No. DETC2015-46641, pp. V05BT08A006; 11 pages
doi:10.1115/DETC2015-46641
From:
  • ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 5B: 39th Mechanisms and Robotics Conference
  • Boston, Massachusetts, USA, August 2–5, 2015
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5713-7
  • Copyright © 2015 by ASME

abstract

This paper provides a systematic approach to design a vehicle’s independent suspension system. In this approach, multi-link type suspension is selected. By treating it as a parallel mechanism, both the kinematic design and force analysis are conducted in the same framework of screw theory. Regarding the kinematic design, constraint-based approach is used to find suitable layouts of constraint limbs in accordance with desired degree of freedom. In the force analysis, stiffness matrix of the suspension mechanism is developed, leading to the deformation and stress analysis under various critical loads. The developed formulae are further utilized to design suitable suspension mechanism, followed by finite-element-simulation validation as well as optimization design to reduce the resulted maximum stresses.

Copyright © 2015 by ASME

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