Evaluation of human upper limb motion comfort based on motion capture system

Biomechanical study of human upper limb is one of the most referenced aspects for the optimization of upper limb posture and the design of related products. A real-time optical motion capture system-Motion Analysis Eagle Digital System has been used to capture the real-time position of the key points of the human body in the course of the specified action. In this paper, the focus of the work is to calculate the experimental data of the human upper limb by MATLAB software. We get the each joint angle of the human upper limb by the inverse kinematics, and the joint torque is obtained by the inverse dynamic. We put forward to use optimization functions to calculate the muscle forces, and the optimization algorithm is verified by OpenSim simulation. Last, the calculation and evaluation flow of human upper limb comfort is established. The experiment proves that the human upper limb muscles are in the comfort state during taking the book from the right rear of the body. The experimental conclusion put a theoretical foundation for studying on human upper limb motion and designing of related auxiliary products