Simulation of microenvironmental partial pressure inside spacesuits during near-Earth orbit extravehicular activities and intelligent health state assessment

Spacesuits are essential for space exploration because they allow astronauts to operate in extreme environments. This paper presents mathematical models of the partial pressures of gases inside extravehicular spacesuits, which can be used to simulate the partial pressures of oxygen, carbon dioxide and water vapour in the microenvironment during extravehicular activities. The results show that the partial pressure of gases fluctuates with the metabolic heat load of the human body, implying that the intensity of the activity has an impact on the internal pressure environment. Controlling the partial pressure of gases can create a safe and comfortable working environment, and the partial pressure model can serve as a foundation for mission safety. Furthermore, an intelligent health state assessment model is proposed to deal with variable extravehicular activities and compensate for the limitations of traditional reliability analysis methods. The novel health assessment method can examine the effects of multiple influencing factors on the spacesuit. The addition of a failure simulation unit allows for the simulation of unexpected events as well as the incorporation of maintenance instructions, making the reliability analysis more intelligent and adaptable to complex and variable extravehicular activities.