Knee joint biomechanics in transtibial amputees in gait, cycling, and elliptical training.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: A. Matt Robinson declares an author commercial affiliation to Hanger Clinic. Mr. Robinson is a licensed Hanger Clinic prosthetist and contributed to study design and implementation. This does not alter our adherence to PLOS ONE policies on sharing data and materials. 17. Zhongguo Yi Liao Qi Xie Za Zhi. 2023 Nov 30;47(6):612-616. doi: 10.3969/j.issn.1671-7104.2023.06.005. [Structure Design of Hip Joint Parallel Rehabilitation Exoskeleton]. [Article in Chinese] Huang Y(1), Li H(1), Gao Y(1), Yang L(1). Author information: (1)School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610036. At present, most of the research on hip exoskeleton robots adopts the method of decoupling analysis of hip joint motion, decoupling the ball pair motion of hip joint into rotational motion on sagittal plane, coronal plane and cross section, and designing it into series mechanism. Aiming at the problems of error accumulation and man-machine coupling in series mechanism, a parallel hip rehabilitation exoskeleton structure is proposed based on the bionic analysis of human hip joint. The structure model is established and the kinematics analysis is carried out. Through the OpenSim software, the curve of hip flexion and extension, adduction and abduction angle in a gait cycle is obtained. The inverse solution of the structure is obtained by the D-H coordinate system method. The gait data points are selected and compared with the inverse solution obtained by ADAMS software simulation. The results show that the inverse solution expression is correct. The parallel hip exoskeleton structure can meet the requirements of the rotation angle of the hip joint of the human body, and can basically achieve the movement of the hip joint, which is helpful to improve the human-computer interaction performance of the exoskeleton. DOI: 10.3969/j.issn.1671-7104.2023.06.005