TY - GEN
T1 - A heterogeneous model for gait analysis of the lower-limb and the prosthesis coupled system
AU - Lv, Yang
AU - Fang, Hongbin
AU - Xu, Jian
AU - Wang, Qining
AU - Zhang, Xiaoxu
N1 - Publisher Copyright:
Copyright © 2020 ASME.
PY - 2020
Y1 - 2020
N2 - By considering the coupling effect between the healthy lower-limb and the passive prosthesis, this paper builds a heterogeneous dynamic model for gait analysis, where the motions of the healthy limb and the prosthesis are driven by the central pattern generator (CPG) and the hip joint swing, respectively. The foot-ground contact is modelled as the process of unilateral force reaction rather than the constraint to get a refined representation of the gait motion. The response of the heterogeneous model, solved by numerical calculation, is then analyzed by comparison with a real gait test. Preliminary results show that the heterogeneous model not only describes the amputee's gait well but also reveals a new gait feature of perioddoubling. Parameter analysis further indicates that the perioddoubling gait will return to the single-period pattern by amplifying the vertical motion of the hip joint at the amputated side. This dynamic bifurcation, which mimics the process of hip swing adaption, provides new insight into the compensatory mechanism for lamely walking.
AB - By considering the coupling effect between the healthy lower-limb and the passive prosthesis, this paper builds a heterogeneous dynamic model for gait analysis, where the motions of the healthy limb and the prosthesis are driven by the central pattern generator (CPG) and the hip joint swing, respectively. The foot-ground contact is modelled as the process of unilateral force reaction rather than the constraint to get a refined representation of the gait motion. The response of the heterogeneous model, solved by numerical calculation, is then analyzed by comparison with a real gait test. Preliminary results show that the heterogeneous model not only describes the amputee's gait well but also reveals a new gait feature of perioddoubling. Parameter analysis further indicates that the perioddoubling gait will return to the single-period pattern by amplifying the vertical motion of the hip joint at the amputated side. This dynamic bifurcation, which mimics the process of hip swing adaption, provides new insight into the compensatory mechanism for lamely walking.
KW - Central pattern generator
KW - Compensatory mechanism
KW - Dynamic modelling
KW - Foot-ground contact
KW - Passive prosthesis
UR - https://www.scopus.com/pages/publications/85096290125
U2 - 10.1115/DETC2020-22392
DO - 10.1115/DETC2020-22392
M3 - 会议稿件
AN - SCOPUS:85096290125
T3 - Proceedings of the ASME Design Engineering Technical Conference
BT - 16th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC)
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2020
Y2 - 17 August 2020 through 19 August 2020
ER -