彭迎虎,陈瑱贤,胡家渝,张志峰,靳忠民,尉萍萍.人体足地接触模型的步速适用性[J].医用生物力学,2019,34(5):514-521
人体足地接触模型的步速适用性
Applicability of Foot-Ground Contact Model at Different Gait Speed
投稿时间:2018-05-08  修订日期:2018-12-24
DOI:
中文关键词:  足地接触模型  地面反作用力  地面反作用力矩  骨肌多体动力学  步态
英文关键词:foot-ground contact model  ground reaction force (GRF)  ground reaction moment (GRM)  musculoskeletal multi-body dynamics  gait
基金项目:国家自然科学基金项目(51205303, 51323007)
作者单位
彭迎虎 西安交通大学 机械制造系统工程国家重点实验室 
陈瑱贤 西安交通大学 机械制造系统工程国家重点实验室 
胡家渝 西安交通大学 机械制造系统工程国家重点实验室 
张志峰 西安交通大学 机械制造系统工程国家重点实验室 
靳忠民 西安交通大学 机械制造系统工程国家重点实验室 
尉萍萍 西安交通大学 机械制造系统工程国家重点实验室 
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中文摘要:
      目的 构建骨肌多体动力学足地接触模型,研究其适用速度范围。方法 采集5名测试者的步态运动数据,以骨肌多体动力学仿真软件AnyBody全身模型为基础,建立足地接触模型,分析慢走、正常行走、快走和慢跑不同步态速度下的地面反作用力(ground reaction force, GRF)和地面反作用力矩(ground reaction moment, GRM),并与测力板实验测量值进行对比,分析模型预测精度,获得足地接触模型的适用范围。结果 在慢走、正常走和快走(步速0.69~1.68 m/s)时,足地接触模型预测能力较高,GRF预测值与实验值相关性大于0.875,GRM预测值与实验值相关性大于0.9。结论 所开发的足地接触模型同时计算GRF和GRM,可以消除步态分析中对测力板的依赖,能够应用于老年人及病理性步态等低速步态的运动学分析。
英文摘要:
      Objective To establish the musculoskeletal multi-body dynamic foot-ground contact model and explore its applicability at different speed. Methods The gait data of the subjects at different speed were collected, and the foot-ground contact model was established based on the full body model from the musculoskeletal multibody dynamic software AnyBody. Then the calculated ground reaction forces (GRFs) and ground reaction moments (GRMs) at different speed (slow walking, normal walking, fast walking and jogging) were compared with the measurements from the force plates. Results The predicted GRFs and GRMs correlated well with the experimental measurements at slow, normal and fast speed (stride speed ranged from 0.69 to 1.68 m/s). The correlation coefficients between predicted and measured GRFs were greater than 0.875 and the correlation coefficients for GRMs were greater than 0.9. Conclusions The developed foot-ground contact model could simultaneously predict GRFs and GRMs with good accuracy, thus eliminating the dependency on force plates. The model could be applied to low-speed gait conditions, such as the elderly and pathological gait.
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