Title: Analysis of truck cabin egress motion

Authors: Elodie Chateauroux; Xuguang Wang; Christophe Roybin

Addresses: Université de Lyon, F-69622, Lyon, France, Ifsttar, UMR_T9406, LBMC, Université Lyon1, 25, avenue François Mitterrand, Case 24, F-69675 Bron, France; ErgOptim LIER, D29 route de Crémieu, 69125 Lyon Saint Exupery Aéroport, France ' Université de Lyon, F-69622, Lyon, France, Ifsttar, UMR_T9406, LBMC, Université Lyon1, 25, avenue François Mitterrand, Case 24, F-69675 Bron, France ' Volvo 3P – Cab Engineering Lyon, TER C70 0 02, 99, route de Lyon, 69806 Saint-Priest cedex, France

Abstract: The purpose of this work was to analyse truck egress motions in order to simulate them using a digital human model (DHM). Eight subjects participated in the experiment. Twelve truck configurations were tested using an adjustable mock-up. Ingress and egress motions were recorded using an opto-electronic system, synchronised with force sensors to measure contact forces. The motions were reconstructed for a commercial DHM tool by inverse kinematics. The beginning of egress motion was analysed. Motion coordination was investigated thanks to contact diagrams of hands and feet. Two foot strategies (FSs) were observed according to which foot reached the highest step. Four major hand strategies (HSs) were defined according to when the hands moved down along the handles. FSs and HSs were found to be subject specific, but could change depending on the truck configuration.

Keywords: truck cabins; truck egress motion; posture; trucks; ergonomics; simulation; digital human models; digital human modelling; DHM; optoelectronics; force sensors; contact forces; inverse kinematics; motion coordination; foot strategies; hand strategies; truck configurations; heavy vehicles; vehicle design; exiting.

DOI: 10.1504/IJHFMS.2012.051095

International Journal of Human Factors Modelling and Simulation, 2012 Vol.3 No.2, pp.169 - 186

Available online: 19 Dec 2012 *

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