Title: The influence of asymmetry ratio and average of the damping force on the performance and ride comfort of a vehicle

Authors: Harus Laksana Guntur; Listy Fazria Setiawan

Addresses: Vibration and Dynamic System Laboratory, Mechanical Engineering Department, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia ' Vibration and Dynamic System Laboratory, Mechanical Engineering Department, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia

Abstract: This research focuses on the study of the influence of asymmetrical characteristics of damping force on the ride quality of a typical passenger car. With different standard road inputs, variation of severity parameter, asymmetry ratios, asymetry average as well as the velocity of the vehicle, performance indices and root mean square (RMS) values of acceleration of the sprung mass in respect to vehicle velocity are derived so that the efficacy of the asymmetrical systems can be assessed. The comparison between the symmetrical and asymmetrical systems subjected to the modified bump inputs showed that the asymmetrical system, with nonlinear characteristics and asymmetry ratio above 1, tends to have a smoother and more progressive performance. The comparison between the symmetrical and asymmetrical systems subjected to harmonic inputs showed that the asymmetry ratio of the systems does not influence the performance, instead the asymmetry average does.

Keywords: asymmetric damping force; vehicle ride comfort; vehicle performance index; suspension systems; passenger cars; root mean square; RMS; sprung mass acceleration; vehicle velocity; vehicle speed; bump inputs; harmonic inputs.

DOI: 10.1504/IJVSMT.2016.077924

International Journal of Vehicle Systems Modelling and Testing, 2016 Vol.11 No.2, pp.97 - 115

Received: 25 Aug 2015
Accepted: 30 Jan 2016
Published online: 22 Jul 2016 *

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