足踝步态模拟机动力学特性仿真及实验验证  

Simulation on dynamic characteristics of the ankle gait simulator and experimental verification

作　　者：冯洋[1] 王冬梅[1] 刘安民 王旭[3] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]Centre for Health Sciences Research,School of Health Sciences,University of Salford [3]复旦大学附属华山医院骨科,上海200040

出　　处：《医用生物力学》2014年第5期393-398,共6页Journal of Medical Biomechanics

基　　金：国家自然科学基金资助项目(81071234)

摘　　要：目的研究足踝步态模拟机动力学特性,仿真着地相中的足底垂直、前后、水平3个足底反力,并在实验台中验证。方法运用设计的5自由度步态模拟机,建立Adams虚拟样机和足踝模型(包含足部主要韧带和跖腱膜、足底软组织及跟腱力),对其进行动力学仿真,并把仿真中的控制规律运用到实验台验证;将仿真和实验中测力板测得的足底反力与仿真和真实数据比较。结果着地相进程中3个方向的足底反力与实际步态中吻合度较高,足部的韧带和跖腱膜、跟腱和软组织等对正确的步态有重要的影响,步态实验台能够很好重复仿真特性。结论模拟机具备仿真人体步态着地相的能力,为活体无法进行测量的实验提供临床研究平台。Objective To study dynamic characteristics of the ankle gait simulator,simulate plantar forces in the vertical,anterior-posterior,right-left direction during the stance phase,and validate such forces in the experimental setup.Methods The Adams virtual prototype and ankle model （including tendons,ligaments and soft tissues of foot） were established for dynamic simulation based on the self-developed 5 DOF gait simulator.The dynamic results from both the prototype and gait simulator were compared with the real plantar forces.Results The simulated plantar force could accurately fit the normal in vivo ankle position curves during a stance phase in three directions,and the tendons,ligaments and soft tissues had important influences on the correct gait.The simulated plantar force by the gait simulator could be repeatedly fit for the real stance plantar force.Conclusions The gait simulator was proved to simulate the human gait stance well and can provide a clinical research platform for those experiments which are incapable of in vivo measurement.

关 键 词：足踝 动力学仿真 步态模拟机 足底反力 

分 类 号：R318.01[医药卫生—生物医学工程]