飞行员工作负荷多维客观测量方法的误差研究

Error Analysis on Multidimensional Objective Measurement of Pilot's Workload

飞行员工作负荷的评价工作是保证飞行安全的重要环节。基于工作负荷的多维客观测量方法,分析了测量过程中的误差来源。主要针对眼动信号的时延误差进行了详细的误差建模,研究了该误差对飞行员工作负荷评估的影响。研究表明,当眼动信号的时延在一定范围(约300 ms)内时,测量得到的飞行员实时工作负荷可以保留完整的关键信息。随着时延误差的增大,得到的工作负荷误差也增大。因此,在测量飞行员工作负荷的过程中,需将眼动信号的时延误差控制在一定范围内,保证结果的可靠性。

Evaluation of pilot＇s in-flight workload is a significant consideration for the However, some errors may be brought in the measurement and the recording of objective safety of civil aviation. parameters. Based on a multidimensional workload evaluation, the time delay of eye movement and its impacts on workload evaluation are analyzed. The results shows that within a certain limit of error around 300 ms, varying from pilots to pilots, workload can keep the main information of the original workload. As the error increases, the workload may become unreliable. As a consequence, the time-delay error of eye movement should be controlled within a limited scale to ensure the validity and reliability of workload.