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人体可以很好地适应地球的重力。但是近代航空与宇航的发展,经常遇到超过许可范围的冲击,振动,失重以及正、负、向前、向后和角加速度的情况,从而使人体暴露在高的和异常的重力场的危险之中。对人体的这种非正常加速往往会导致心肌无力、头疼、腹疼、视力损坏、器官出血与破裂等症状。心血管系统最容易感受到环境力的变化。在航空与航天的飞行中,为了提高对加速度的忍耐力,保护装置的设计必须考虑到心血管系统对加速
The human body can well adapt to the Earth’s gravity. However, the development of modern aviation and astronautics often encounters shocks, vibrations, weightlessness and positive, negative, forward, backward and angular accelerations beyond the permissible range so that the human body is exposed to the high and unusual gravity fields Among them. This abnormal acceleration of the human body often leads to weakness in the heart muscle, headache, abdominal pain, visual impairment, organ bleeding and rupture. The cardiovascular system is most susceptible to changes in environmental forces. In aviation and space flight, in order to increase endurance to acceleration, the design of the protection device must take into account the acceleration of the cardiovascular system