摘要
目的为更好评价踝足矫形器(ankle⁃foot orthosis,AFO)的人机工效,提出一种AFO人机耦合仿真刚度对步态生物力学影响的评价方法。方法首先,评测两种AFO的力学特性并量化其刚度;其次,采集30名受试者在正常与穿戴两种不同刚度AFO行走条件下的运动学及动力学数据;最后,通过仿真计算,定量对比分析AFO刚度对行走中下肢关节角度、关节力矩与肌肉力的影响。结果在穿戴两种刚度AFO情况下,支撑相踝关节背屈峰值角度、膝关节屈曲峰值角度和髋关节伸展峰值角度均显著增加(P<0.05),比目鱼肌与腓肠肌峰值肌肉力呈现增加趋势。踝关节跖屈峰值角度、髋关节屈曲峰值角度与髋关节屈曲峰值力矩均显著降低(P<0.05)。结论本文所提出的AFO人机耦合仿真方法可以有效实现不同刚度对步态生物力学影响的定量评估,该方法同样也适用于评估和优化其他辅助器具的人机工效,可以为AFO的选配、适配、优化设计提供方法指导。
Objective To better evaluate the ergonomics of an ankle⁃foot orthosis(AFO),this study proposed a method for evaluating the impact of AFO stiffness on gait biomechanics based on human⁃machine coupling model.Methods Firstly,mechanical properties for two kinds of AFO were evaluated,and AFO stiffnesses were quantified.Next,kinetics and kinematics parameters from lower limb joints of 30 subjects were collected during normal walking and walking with two kinds of AFO stiffness.Finally,the impact of AFO stiffness on joint angle,joint torque,and muscle force of lower limbs during walking were quantitatively analyzed by simulation.Results Under the circumstance of two different AFO stiffness,the peak ankle dorsiflexion angle,peak knee flexion angle,and hip extension angle significantly increased(P<0.05).The peak muscle force of soleus and gastrocnemius also showed an increasing trend.The peak ankle plantarflexion angle,hip flexion angle and peak moment of hip flexion obviously decreased(P<0.05).Conclusions The AFO human⁃machine coupling simulation method can effectively realize the quantitative evaluation of the AFO stiffness effect on gait biomechanics.It can also be applied to assess and optimize the ergonomics of other assistive devices.These results provide theoretical guidance for the selection,adaptation,and optimization design of AFO.
作者
陈亚茹
王家兴
梁洪宇
刘蓉
刘海斌
CHEN Yaru;WANG Jiaxing;LIANG Hongyu;LIU Rong;LIU Haibin(Liaoning Key Laboratory of Integrated Circuit and Biomedical Electronic System,School of Biomedical Engineering Dalian University of Technology,Dalian 116024,Liaoning,China;School of Kinesiology and Health Promotion,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《医用生物力学》
CAS
CSCD
北大核心
2022年第5期826-831,845,共7页
Journal of Medical Biomechanics
基金
国家自然科学基金项目(81728009)
辽宁省科技厅联合开放基金机器人学国家重点实验室开放基金资助项目(2020⁃KF⁃12⁃04)
中央高校基本业务经费(DUT21JC19)。
关键词
人机耦合
踝足矫形器
刚度
步态生物力学
human⁃machine coupling
ankle⁃foot orthosis(AFO)
stiffness
gait biomechanics
