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Advances in Acoustics and Vibration
Volume 2016 (2016), Article ID 3259026, 10 pages
http://dx.doi.org/10.1155/2016/3259026
Research Article

Optimization of Automotive Suspension System by Design of Experiments: A Nonderivative Method

Department of Mechanical Engineering, MES’s College of Engineering, Wadia College Campus, 19 Late Prin, V. K. Joag Path, Pune 411001, India

Received 20 April 2016; Accepted 22 June 2016

Academic Editor: Marek Pawelczyk

Copyright © 2016 Anirban C. Mitra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A lot of health issues like low back pain, digestive disorders, and musculoskeletal disorders are caused as a result of the whole body vibrations induced by automobiles. This paper is concerned with the enhancement and optimization of suspension performance by using factorial methods of Design of Experiments, a nonderivative method. It focuses on the optimization of ride comfort and determining the parameters which affect the suspension behavior significantly as per the guidelines stated in ISO 2631-1:1997 standards. A quarter car test rig integrated with a LabVIEW based data acquisition system was developed to understand the real time behavior of a vehicle. In the pilot experiment, only three primary suspension parameters, that is, spring-stiffness, damping, and sprung mass, were considered and the full factorial method was implemented for the purpose of optimization. But the regression analysis of the data obtained rendered a very low goodness of fit which indicated that other parameters are likely to influence the response. Subsequently, steering geometry angles, camber and toe and tire pressure, were included in the design. Fractional factorial method with six factors was implemented to optimize ride comfort. The resultant optimum combination was then verified on the test rig with high correlation.