静态姿势图在飞行任务负荷所致的疲劳评估中的作用

目的:研究静态姿势图在飞行任务负荷所致疲劳评估中的作用。方法:30名符合条件的男性大学生被要求持续进行4小时的模拟飞行任务负荷,其静态姿势图及任务负荷成绩将在每小时末进行重复测量。根据变化敏感的参数,静态立位平衡指数将通过主成分分析法进行计算。随后,该指数与任务负荷水平的相互关系将通过曲线拟合进行分析。结果:在模拟飞行任务负荷影响下,被试静态姿势控制能力明显下降。静态立位平衡指数随着任务负荷时间的持续而明显增大,并与任务负荷时间存在线性关系(R~2=0.949);多重任务成绩与任务负荷持续时间之间存在二次曲线的关系(R~2=0.968),与静态立位平衡指数也呈现相似的二次方曲线关系(R~2=0.976)。结论:静态姿势图与飞行任务负荷水平具有线性关系,能够反映任务负荷所致疲劳水平的大小。

Role of Static Posturography in Fatigue Assessment due to Flight TasksLoad

ABSTRACT Objective: To explore the role of static posturography in the assessment of fatigue due to flight tasks. Methods: Thirtymale college students were asked to perform simulated flight tasks consecutively forfour hours. Meanwhile their static posturography and tasks performance would be repeatedly measured during the task-load at end of every hour. Based on the changed significantly parameters, the static balance index would be built by principle component analysis. Then its correlation with task-load level would be further analyzed by curve estimation. Results: Static postural control declined significantly under effect of simulated flight tasks. With task load sustaining, static balance index increased significantly and correlated linearly with duration of task load (R²=0.949). Besides, there was quadratic relationship between the change of multi-tasks performance and duration of task load (R²=0.968). And correlation of multi-tasks performance with static standing balance level also had been proved to be quadratic (R²=0.976). Conclusion: Static posturography correlated linearly with flight task-load level, which could reflect fatigue level caused by task load.