Title: Simulation of telescopic shock absorber outer characteristic with piecewise maths function

Authors: Changcheng Zhou, Xueyi Zhang, Jie Meng, Leilei Zhao

Addresses: School of Transport and Vehicle Engineering, Shandong University of Technology, 12 Zhangzhou road, Shandong Zibo 255049, China. ' School of Transport and Vehicle Engineering, Shandong University of Technology, 12 Zhangzhou road, Shandong Zibo 255049, China. ' School of Transport and Vehicle Engineering, Shandong University of Technology, 12 Zhangzhou road, Shandong Zibo 255049, China. ' School of Transport and Vehicle Engineering, Shandong University of Technology, 12 Zhangzhou road, Shandong Zibo 255049, China

Abstract: The pathway throttle and local throttle loss of oil fluxion of telescopic shock absorber were analysed and the curves of pathway loss coefficient and equivalent length of piston hole vs. shock absorber velocity are shown. According to the thickness and the pre-deformation of throttle slice, and the throttle hole area, the velocity points of valve opening were analysed by the relation of flux to the velocity, and pressure to the deformation of throttle slice, and the analytic formulas of shock absorber velocity during valve openings were given. On the basis of the velocity points, the outer characteristic model of shock absorber was established by piecewise linear function. A practical example of simulation of shock absorber outer characteristic was given, and the performance test was conducted. The results show that the model of outer simulation is correct, the simulation values coincide with test values, and it has important reference value for telescope shock absorber design and characteristic analysis.

Keywords: modelling; simulation; piecewise linear function; telescopic shock absorbers; vehicle shock absorbers; throttle slice; shock absorber design.

DOI: 10.1504/IJMIC.2009.027018

International Journal of Modelling, Identification and Control, 2009 Vol.7 No.1, pp.8 - 14

Published online: 13 Jul 2009 *

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