不同背角的+G作用对跟踪效率的影响

 本文在大型人体离心机上,在不同座椅背角超重条件下,利用补偿跟踪方法对人的跟踪操作效率进行了研究,观察到伴随超重值的改交,被试者的跟踪误差、手控操作动态参数和心理一生理负荷发生了变化。增大座椅背角和使用侧管式抗荷服,对被试者的工作效率有改善作用。这一结果,从人的工作效率的角度,为高性能歼击机超重防护方案的选择提供了客观依据。

EFFECT OF +G STRESS AT DIFFERENT SEAT BACK ANGLES ON HUMAN OPERATOR TRACKING PERFORMANCE

Five young male subjects wearing an anti-G suit were exposed to +G stress at four seatback angles and were tested for tracking performance on a human centrifuge of six meter radius. Some physical parameters, tracking error, output signal of side-arm controller and physiological parameters such as ECG, upper arm blood pressure and respiration were recorded. Method of complex analysis and system indentitication were used for data processing.It showed that subject's mean tracking error and psycho-physiological load increase with increase of G value and decrease of seat-back angles. Subject's tracking performance was improved by inflation of a-nti-G suit at G levels 0.3G lower than G levels at which peripheral vision loss occured. In comparing human operating dynamic parameters such as steady gain, effective delay time and frequency of tracking motion at 15 and 60 seatback angle. It was found that tracking performance was better at 60 seatback angle. Method for evaluation of human working ability and cause of change in human operator tracking performance under +G stress, were also analysed and discussed.