Global Journal of Researches in Engineering, G: Industrial Engineering, Volume 23 Issue 2

Figure 2.1: The VR Environment in Unity 3D for Participants to Complete Tasks b) Subjects and System Setup A total of twenty-two subjects were recruited for this study, and their body height and weight are presentedby the mean value ± standard deviation (11 males: 179.6 ± 3.4cm (height), and 78.1 ± 5.7kg (weight); 11 females: 164.6 ± 4.2cm (height), and 67.2 ± 7.9kg (weight)). During the orientation session, all subjects were informed of the study protocols. Anthropometric data, including hand, lower arm, upper arm lengths, arm span, ankle height, foot, shank, and thigh lengths, as well as shoulder and hip widths, were measured for each subject before movement collection. The Xsens MVN Awinda (Xsens 3D Motion Tracking Technology, Netherlands)[17] was used to capture the actual movement of each subject during their task performance in this study. Figure 2.2 (a) illustrates the use of individual digital human models (DHM_Xsens) created in the Xsens Analyze software to represent the digital versions of the subjects. A second digital human model (DHM_JACK, Figure 2.2 (b)) was created in JACK simulationtool (Siemens PLM software)[18] to evaluate the forces exerted on the lower back of subjects, based on the anthropometric data collected in the orientation section. The trajectory of kinematic motion data from the DHM_Xsens was exported into JACK, which has a unique feature that allows alignment of the skeletal segments of DHM_Xsens to the anatomical joint centers of DHM_JACK, thus achieving actual human movement in DHM_JACK. Figure 2.2: The Integration of Xsensawinda Software (Left) with JACK Siemens Ergonomics Software (Right). The Motion of Both Dhms is Synchronous © 2023 Global Journals Global Journal of Researches in Engineering Volume XxXIII Issue II Version I 3 Year 2023 ( ) G Evaluating the Risk of Injury for Aircraft Attendants using Virtual Reality and Advanced Motion Tracking System Integrated with Ergonomics Analysis