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Mathematical Problems in Engineering
Volume 2015, Article ID 313182, 9 pages
Research Article

Optimization of Steering System of Forklift Vehicle for Idle Performance

1School of Electronics and Information Engineering, Hefei Normal University, Hefei 230000, China
2Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China

Received 28 July 2015; Revised 15 October 2015; Accepted 15 October 2015

Academic Editor: Milan Hladík

Copyright © 2015 Yuan Shen 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.


This paper presents an optimal design process for the steering system of a forklift vehicle. An efficient procedure for minimizing the engine-induced idle vibration is developed in this study. Reciprocating unbalance and gas pressure torque as two major sources of engine excitation are studied. Using the field vibration tests and FEM analysis, the cause and characteristics of steering system’s idle vibration are recognized. So as to distribute the characteristic modes based on the optimization strategy, global sensitivity analysis of the main parameters is also carried out to achieve the optimal combination of the optimization factors. Based on all analysis above, some structure modifications for optimization are presented to control the idle vibration. The effectiveness and rationality of the improvements are also verified through experimental prototyping testing. This study also makes it possible to provide a design guideline using CAE (computer aided engineering) analysis for some other objects.