Journal ID : AMA-05-08-2021-10523
[This article belongs to Volume - 52, Issue - 01]
Total View : 435

Title : Effectiveness evaluation of a novel hydro-pneumatic suspension system on an earth-moving equipment ride comfort

Abstract :

This study proposes a nonlinear dynamic model for a novel hydro-pneumatic suspension system of an earth-moving equipment based on traditional dynamic model with changing the properties of the elastic and damping elements with an auxiliary air chamber. And then, a quarter-vehicle dynamic model of suspension system is set up to evaluate and compare vehicle ride comfort performance between novel hydro-pneumatic suspension system and traditional hydro-pneumatic suspension system under the different operating conditions of vehicle via the root mean square (r.m.s) acceleration responses of vehicle body (awz) according to international standard ISO 2631-1:1997 and power spectral density (PSD) acceleration responses of vehicle body. The numerical simulation results indicate that awz values and peak amplitude values with the novel hydro-pneumatic suspension system respectively reduce in comparison with the traditional hydro-pneumatic suspension system. Especially, vehicle ride comfort performance with novel hydro-pneumatic suspension system significantly improves in the low frequency region of from 0.5 Hz to 10 Hz when vehicle moves on from ISO class C road surface at speed of 40km/h and full load. Finally, the different operating conditions of vehicle are chosen to verify and evaluate the effectiveness of the novel hydro-pneumatic suspension system in comparison with the traditional hydro-pneumatic suspension system. The obtained results indicate that the proposed system significantly performs better than the traditional hydro-pneumatic suspension system does in terms of ride comfort of vehicle.

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