Title: A comparison of test manoeuvres for determining rearward amplification of articulated heavy vehicles

Authors: Zhituo Ni; Shenjin Zhu; Yuping He

Addresses: Department of Automotive, Mechanical and Manufacturing Engineering, University of Ontario Institute of Technology, Oshawa, Ontario, Canada L1H 7K4 ' Department of Automotive, Mechanical and Manufacturing Engineering, University of Ontario Institute of Technology, Oshawa, Ontario, Canada L1H 7K4 ' Department of Automotive, Mechanical and Manufacturing Engineering, University of Ontario Institute of Technology, Oshawa, Ontario, Canada L1H 7K4

Abstract: Rearward amplification (RA) is an effective indicator of lateral stability for multi-trailer articulated heavy vehicles (MTAHVs). The International Organization for Standardization released the test manoeuvres, ISO-14791, for determining the indicator for MTAHVs. ISO-14791 recommends three methods, including two time-domain and one frequency-domain, to derive the RA measures. It was reported that the results from the three methods were not in good agreement. To explore this inconsistency among these methods, a multiple cycle sine-wave steering input (MCSSI) manoeuvre was simulated to obtain steady-state responses of MTAHVs. Furthermore, an automated frequency response method (AFRM) was used to derive the measures in the frequency-domain. This paper presents simulation results based on an A-Train Double. Results demonstrate that the steady-state RA measures under a MCSSI manoeuvre are in excellent agreement with those from frequency-domain methods. It is revealed that driver's steering behaviours impose a non-negligible impact on the transient RA measures of MTAHVs.

Keywords: RA; rearward amplification; test manoeuvres; ISO-14791; MTAHVs; multi-trailer articulated heavy vehicles; lateral dynamics; numerical simulation.

DOI: 10.1504/IJHVS.2020.109285

International Journal of Heavy Vehicle Systems, 2020 Vol.27 No.4, pp.405 - 421

Received: 17 Feb 2017
Accepted: 05 Nov 2017
Published online: 03 Sep 2020 *

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