基于机械系统动力学自动分析的步态仿真足部分块模型

A Multi-segment Foot Model for Gait Simulation Based on Automatic Dynamic Analysis of Mechanical Systems

本文旨在建立适用于步态动力学仿真分析的足部分块模型并验证其有效性及实用性。本文基于新型的混合驱动人体步态试验机,将骨骼模型导入机械系统动力学自动分析软件(ADAMS)中,结合在其中建立的足部韧带、筋膜、肌肉模型及柔性体足底软组织模型,组成足部分块模型。用在体试验采集到的步态数据作为驱动,并在模型上加载肌肉力和肌腱力,进行步态模拟。将得到的地面反作用力及关节旋转角度与报道结果进行比较,验证了模型的有效性。本文仿真结果表明,本模型能较好地用于步态动力学仿真分析,并有望作为进一步研究的工具。

This study aims to establish a multi-segment foot model which can be applied in dynamic gait simulation. The effectiveness and practicability of this model were verified afterwards by comparing simulation results with those of previous researches. Based on a novel hybrid dynamic gait simulator, bone models were imported into automatic dynamic analysis of mechanical systems （ADAMS）. Then, they were combined with ligaments, fascia, muscle and plantar soft tissue that were developed in ADMAS. Multi-segment foot model was consisted of these parts. Experimental data of human gait along with muscle forces and tendon forces from literature were used to drive the model and perform gait simulation. Ground reaction forces and joints revolution angles obtained after simulation were compared with those of previous researches to validate this model. It showed that the model developed in this paper could be used in the dynamic gait simulation and would be able to be applied in the further research.