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

Pose#1 in Task#1: The first pose where the excessive force was detected was observed when the subjects began to open the cabin door, as depicted in Figure 2.4 (a). For safety considerations, a force magnitude of 140N [21,22] was applied to the palm of the dominant right hand, with a pushing forward direction. Pose#2 in Task#1: The second posture that may put the subjects at risk was identified when they started closing the door, as shown in Figure 2.4 (b). The magnitude of the applied hand force was also set to 140N, with its direction perpendicular to the door and pointing towards the left side. Pose#1 in Task#2: The first pose of interest was observed as the subjects initiated the lifting of the luggage from the floor, as shown in Figure 2.4 (c). To conform with the airline luggage regulations, we used a luggage weight of 10kg [20]. The magnitude of force applied to each hand was determined to be 50N ( F = m x a /2) to maintain consistency across subjects, with the direction of force being vertically upward. Pose#2 in Task#2: The second pose was detected as the subjects placed the luggage in the overhead compartment, as shown in Figure 2.4 (d). We assumed that the magnitude of the applied hand force was still 50N for each hand, and the direction was upward. (a) (b) (c) (d) Figure 2.4: The Four Detected Postures had Excessive Forces Exerted on the L4/L5lumbar Spine.(a) Opening the Passenger Door; (b) Closing the Passenger Door; (c) Lifting the Luggage from the Floor; (d) Placing the Luggage into the Compartment © 2023 Global Journals Global Journal of Researches in Engineering Volume XxXIII Issue II Version I 5 Year 2023 ( ) G Evaluating the Risk of Injury for Aircraft Attendants using Virtual Reality and Advanced Motion Tracking System Integrated with Ergonomics Analysis