后倾座椅与GZ-2抗荷服综合抗荷性能测定

+Gz PROTECTION PROVIDED BY TILT-BACK SEAT AND GZ-2 ANTI-G SUIT

目的 :探讨后倾座椅与GZ 2抗荷服的综合抗荷性能。方法 :在离心机上 ( +Gz增长率为 3G/s)先测出 6名受试者采用 13°座椅时的基础 +Gz耐力 ,然后测定受试者采用 13°座椅、并穿GZ 2抗荷服充气时的 +Gz耐力 ,再测定受试者采用 45°后倾座椅、并穿GZ 2抗荷服充气时的 +Gz耐力 ,其与基础 +Gz耐力之差 ,即为 45°座椅与GZ 2抗荷服的综合抗荷性能。结果 :受试者采用 13°座椅、穿GZ 2时的抗荷性能为 3 .0 6G ,采用 45°座椅、穿GZ 2时的抗荷性能为 4.13G ,抗荷性能比前者高出 1.0 6G。结论 :后倾座椅 (椅背角为 45°)可大幅度提高人体

Aim: To investigate the +Gz protection provided by tilt-back seat and GZ-2 anti-G suit. Methods: 6 subjects were exposed t o centrifuge and onset rate is 3 G/s. First, their relaxed +Gz tolerances were determined while using tilt-back seat of 13°. Secondly, it was their + Gz tolerance provided by pressurized GZ-2 anti-G suit and tilt-back seat of 13°. Finally, their +Gz tolerances while using pressurized GZ-2 ant i-G suit and tilt-back seat of 45° were determined. The difference between th e first and the third result was the +Gz protection that pressurized GZ- 2 anti-G suit and tilt-back seat of 45°offered. Results: +Gz protection of pressurized GZ-2 anti-G suit and tilt-back seat of 13° was 3.06 G, and +Gz protection of pressurized GZ-2 anti-G suit a nd tilt-back seat of 45° was 4.13 G, which had an increase of 1.06 G. C onclusion: Tilt-back seat of 45° can greatly enhance +Gz toleranc es of human.