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	Mathematical modeling of high G protection afforded by various anti-G equipment and techniques
	Lu, Hong-Bing ; Zhang, Li-Fan ; Bai, Jing ; Liu, Xin ; Zhang, Guo-Peng
	2010-05-11 ; 2010-05-11
关键词	mathematical model high-G protection +Gz tolerance anti-G suit reclining-back seat extended coverage anti-G suit positive pressure breathing for plus Gz G-SUIT COVERAGE CARDIOVASCULAR-RESPONSES G-TOLERANCE ACCELERATION SIMULATION BLADDER Public, Environmental & Occupational Health Medicine, General & Internal Sport Sciences
中文摘要	Background: It is difficult to assess how different combinations of recently developed anti-G protective equipment will affect +Gz tolerance and central hemodynamics during high G solely by centrifuge experiments. In this paper we report a mathematical model simulating the effects of various combinations on human circulatory response and +Gz tolerance, and its validation with published centrifuge data. Methods: A structurally based mechanistic model incorporating cardio-pulmonary function, as well as a more detailed modeling of vessel segments for different anatomic regions, was established to simulate hemodynamic responses during high-G exposure and the protection afforded by various protective modalities, such as tilt-back seats, extended coverage anti-G suits (ECGS), and positive pressure breathing for +Gz (PBG). Results: There were 43 pairs of human data from centrifuge trials and model outputs under the same or similar conditions that were compared. This comparison indicated that in 86% of cases the differences were less than 15%. From the model outputs, the best combinations which satisfied different protective needs, such as protection to +9 Gz, +10 Gz, and +12 Gz, respectively, could be discovered. They also suggested that while the combined protection of ECGS with PBG may be expressed as a simple addition of the two effects, the combined effect of the tilt-back seat with ECGS and/or PBG seemed to be better fitted by a synergistic model. Conclusions: Comparisons with published centrifuge data have suggested the validity and confidence of the model developed. The benefits and limitations of the model for future high-G physiology and protection are discussed.
语种	英语 ; 英语
出版者	AEROSPACE MEDICAL ASSOC ; ALEXANDRIA ; 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27759]
专题	清华大学
推荐引用方式 GB/T 7714	Lu, Hong-Bing,Zhang, Li-Fan,Bai, Jing,et al. Mathematical modeling of high G protection afforded by various anti-G equipment and techniques[J],2010, 2010.
APA	Lu, Hong-Bing,Zhang, Li-Fan,Bai, Jing,Liu, Xin,&Zhang, Guo-Peng.(2010).Mathematical modeling of high G protection afforded by various anti-G equipment and techniques..
MLA	Lu, Hong-Bing,et al."Mathematical modeling of high G protection afforded by various anti-G equipment and techniques".(2010).

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