Conference Agenda
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HF/ERG 1: Human Factors & Ergonomics 1 Location: B8.1.2 Session Chair: Prof. Francesca De Crescenzio, University of Bologna Session Chair: Marianna Ciccarelli, Universitas Mercatorum | |
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Wearable-Driven OpenSim Model for Industrial Ergonomics University of Bergamo, Italy Quantitative ergonomic assessment in real workplaces requires portable methods capable of reconstructing workers’ movements without substantially constraining task execution. This study presents a pilot wearable-driven workflow for subject-specific whole-body musculoskeletal modelling within OpenSim. A custom model was developed by integrating validated trunk (FBLS), upper-limb (ARM41), and lowerlimb (GAIT2354) components. Kinematic data were acquired from 10 healthy participants using the Xsens MVN Awinda system during three manual material handling tasks: symmetric lifting, asymmetric lifting, and overhead lifting. A reduced set of 44 virtual markers was defined, and the weights of 32 biomechanically relevant markers were optimized through a multi-stage particle swarm optimization procedure. Scaling was successfully completed for all participants in both N-pose and T-pose configurations. The N-pose yielded a lower optimization cost (0.1162 vs. 0.1236) and lower mean RMS marker error (2.74 vs. 2.92 cm). Joint-level comparison with native Xsens kinematics showed the highest agreement during symmetric lifting, with shoulder correlation up to R = 0.919, whereas agreement decreased during more complex overhead movements. These findings support the workflow as a preliminary kinematic foundation for future wearable-based ergonomic assessment. | |