模拟负荷行走疲劳感评价模型的研究  

Study on perceived fatigue evaluating model during simulated load carriage

作　　者：郑捷文[1] 谌玉红[1] 李晨明[1] 郭亚飞[1] 任鹏飞[1] 

机构地区：[1]总后军需装备研究所,北京100010

出　　处：《中华劳动卫生职业病杂志》2015年第6期444-447,共4页Chinese Journal of Industrial Hygiene and Occupational Diseases

摘　　要：目的 分析不同负荷模拟行走过程中肩部拉力、肩部压力、腰部压力、背部压力及人体主观疲劳感的变化特征,建立基于客观变量的人体负荷行走疲劳感评价模型,为科学开展人体负荷携行研究提供技术手段.方法 采用14名健康成年男性进行4种负荷（25、29、34、37 kg）连续50 min的模拟行走试验（速度5 km/h,坡度0％）,对同步采集肩部拉力、躯干压力进行时域和频域处理,采用多元回归分析对人体负荷行走主观疲劳感进行建模.结果 建立基于肩部拉力、躯干受力分配比、负荷、体重指数（BMI）的人体负荷行军疲劳感评价模型,其校正决定系数（aR2）达到0.709,50 min行军结束时的绝对误差百分比（APE）小于20％;采用频域自变量的回归模型的拟合效果明显优于采用时域自变量的回归模型;能够表征个体差异的BMI的纳入明显增加回归模型的拟合效果.结论 人体负荷行走疲劳评价模型不依赖受试个体的生理变化,可用于建立人体负荷行走测试评估系统,以模拟人代替真人开展试验,解决人体科学携行问题.Objective To establish a perceived fatigue evaluating model during simulated load carriage that is based on objective variables through analyzing the characteristics and trends of shoulder force,shoulder pressure,waist pressure,back pressure,and perceived fatigue,and to provide an analytical technique for research on load carriage.Methods A 50-min simulated walking （at a speed of 5 km/h and a slope of 0%） experiment including 14 healthy male adults was conducted under four levels of backpack payloads （25,29,34,37 kg）.Shoulder force and trunk pressure were sampled simultaneously and analyzed with time-and frequencydomain methods.Multivariable linear regression was used to build a perceived fatigue evaluating model during load carriage.Results The perceived fatigue evaluating model based on shoulder force,trunk pressure distribution ratio,load,and body mass index （BMI） was established.Its adjusted determination coefficient （aR2） was 0.709 and the absolute percentage error （APE） at the end of the experiment was less than 20%.The goodness of fit of the model based on frequency-domain independent variables was much higher compared with the model based on time-domain independent variables.The addition of BMI that represents the individual differences to the model obviously improved the goodness of fit.Conclusion The perceived fatigue evaluating model established in this study does not rely on the physiological changes of individuals,and thus can be used to establish an evaluation system for human load carriage with dummy as a substitution for human in experiments and to provide a scientific basis for efficient human load carriage.

关 键 词：负荷行走 疲劳 多元线性回归 功率谱分析 体重指数 

分 类 号：R87[医药卫生—运动医学]