Computerized task risk assessment using digital human modeling based Job Risk Classification Model

Different from the classical ergonomics analysis, Virtual Interactive Design methodology relies on manikin movements in virtual environment. This platform has been implemented by researchers to accomplish static ergonomic analyses including Rapid Upper Limb Assessment, NIOSH lifting equation and Static Strength Prediction. However, considering only static posture information limits the capacity of ergonomics analysis. In this study, the methodology of performing dynamic ergonomics analysis based on this Virtual Interactive Design platform is proposed. This environment allows velocity and angular velocity of specified body segments/joints calculated for designed tasks to be used to assess the corresponding risk levels based on Job Risk Classification Model. The motion calculation is completed based on the captured interaction between human participants and virtual workplace/mockup. To evaluate the validity and reliability of this upgraded platform, potential errors are analyzed by comparing outputs from several designed experimental conditions.

► Integration of motion capture, virtual environment, digital human modeling and Job Risk Classification Model is achieved.
► Human-virtual environment interaction is achieved through digital human modeling and related technologies.
► Dynamic ergonomics analysis based on reliable human motion can be performed without building physical prototype.
► Potential errors are investigated to test the validity and reliability.
► Validity is degraded primarily by the limitation in virtual environment and means of feedbacks.