Abstract

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Title:: Analysis of human joint force during lower limb rehabilitation training based on bed partial weight support

Author(s):: WANG Zhengyuan; XU Xiulin; School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Keywords:: ; Keywords: bed partial weight support; lower limb rehabilitation training; joint; dynamic modeling; Lagrange method; mathematical model; Matlab simulation

Abstract:: During the lower limb rehabilitation training based on bed partial weight support, the movement and force of the joints of the lower limb in the process of flexion and extension were analyzed. Here, the body is simplified into a 7 rigid body model, and we apply Lagrange method for dynamic modeling and analyzing. The mathematical model is simulated in Matlab to obtain the joint torque when the bed has different inclinations. The joint torque increases with the larger inclination of the bed, and increases with the smaller angle between the thigh and the lower leg. In ADAMS, the geometric model is established according to the human body parameters. The correlation coefficients between the two models are calculated, and the results show that the correlation coefficient between the two methods is close to 1, which verifies the rationality of the mathematical model established by Lagrange method. The research provides a good reference for the development of personalized lower limb rehabilitation training program, and some guidance for the development of lower limb training and rehabilitation equipment.