Posture evaluation for the full-body dynamic simulation in JACK Siemens PLM

The objective of this study is to evaluate the accuracy of predicted postures in JACK Siemens software via comparing with the actual human movement recorded by the Xsens motion tracking system. Seventeen student volunteers were recruited in this study and required to perform a common lift task with different loads. Our statistical results revealed the significant difference of joint angular displacements (e.g., trunk, hips, elbows, knees, and shoulders) between the simulated human movements and actual measurements. Additionally, we estimated the spinal forces imposed on the lower back of participants, which were highly correlated to the joint poses. To provide robust ergonomics analysis, the manufacturers need to continue the efforts to improve their software by reconsidering the significant individual factors, such as the muscle strength between males and females, and the effect of loads on the adopted postures during task performance.