一种新的载人离心机模拟空战机动载荷曲线

A new centrifuge G profile of simulated aerial combat maneuver

目的建立一种新的载人离心机模拟空战机动(simulated aerial combat maneuver, SACM)载荷曲线。方法研究分析国内外歼击机训练的载荷数据, 建立适用于载人离心机的SACM载荷曲线, 并以4名志愿者穿抗荷服、做PHP抗荷动作在载人离心机上进行SACM暴露试验。记录+G_(z)值以及志愿者心电图、耳脉搏等。以志愿者出现周边视力丧失、G-LOC或A-LOC作为判断到达G耐力终点的指征。志愿者到达耐力终点或完成1组SACM载荷曲线的暴露时间作为G-时间耐力。根据志愿者的主观感受对疲劳程度进行评分。结果新建立的2~8 G SACM载荷曲线包含7个平台, 分别是+4 G_(z) 20 s、+2 G_(z) 5 s、+5 G_(z) 10 s、+2 G_(z) 5 s、+6 G_(z) 15 s、+2 G_(z)10 s及+8 G_(z) 5 s平台, +G_(z)暴露总持续时间为85 s, +G_(z)增长率为3 G/s。4名志愿者中的3人完成了SACM暴露, 另1名志愿者没有完成SACM暴露, 在SACM暴露60 s(6 G_(z) 6 s)时发生A-LOC。3名志愿者SACM暴露8 G_(z) 5 s时的平均心率达到了(200±7)次/min;暴露结束后的体力感知度均达到了"明显感觉疲劳"水平。结论本研究基于载人离心机试验提出的2~8 G SACM载荷曲线有助于进一步认识歼击机典型作战载荷变化对机体的影响, 可根据SACM暴露时间、视力及意识变化, 初步对志愿者进行G-时间耐力分级评定。

Objective To establish a new centrifuge G load profile of simulated aerial combat maneuver(SACM).Methods The+G_(z) load data of fighter aircraft training at home and abroad were analyzed.A+G_(z) profile of SACM was established according to the results of data analysis.Four volunteers wearing anti-G suit were exposed to SACM on the centrifuge and performed PHP maneuver.+G_(z) value,electrocardiograph and the ear-pulse signal of volunteers were measured.The peripheral light loss,G-LOC or almost loss of consciousness(A-LOC)of volunteers were taken as the indicators of the G-endurance end point.The exposure time of volunteers to the endpoints or the completion of 1 group SCAM was taken as G-duration tolerance.The fatigue degree of volunteers was rated according to their subjective feelings.Results The new 2-8 G SACM was consisted of 7 plateaus which were+4 G_(z) for 20 s,+2 G_(z) for 5 s,+5 G_(z) for 10 s,+2 G_(z) for 5 s,+6 G_(z) for 15 s,+2 G_(z) for 10 s and+8 G_(z) for 5 s with an onset rate of 3 G/s.The total+G_(z) exposure duration was 85 s.Three of 4 volunteers completed SACM centrifuge exposure.The other one experienced A-LOC and G duration tolerance was 60 s(at 6 s of 6 G_(z)).The mean heart rate of 3 volunteers reached(200±7)beat/min at 8 G_(z) 5 s.All volunteers"obviously felt tired"when they finished SACM exposure.Conclusions The 2-8 G SACM porposed in the centrifuge test can be conducive to furtherly recognize the influences of the changing characteristics of+G_(z) profiles on pilots in fighter typically operational training of this study.The volunteers′G-duration tolerance could be preliminarily evaluated according to exposure duration,changes of vision and consciousness of SACM.