从“3年15次”到“4年20次” “飞天战袍”护航深空探索

Core Insights - The Shenzhou-20 crew successfully completed their third extravehicular activity, with astronaut Chen Dong becoming the Chinese astronaut with the most extravehicular activities, totaling six [1] - The extravehicular suit B has supported 20 extravehicular missions, achieving the goal of "4 years and 20 times" lifespan extension, marking a significant milestone for China's space program [1][3] Group 1: Extravehicular Suit Performance - The second-generation "Feitian" extravehicular suit is designed for a lifespan of "3 years with no less than 15 extravehicular activities" [2] - As of early 2024, the suit has approached the design limit of "3 years and 15 times," prompting a thorough assessment of its remaining lifespan [2] - The suit B has been used by 11 astronauts across 8 manned missions, providing robust support for the operational tasks of the space station [2] Group 2: Technological Advancements - The second-generation "Feitian" extravehicular suit has overcome key technological challenges, ensuring long lifespan, high safety, and efficient operational support [4] - The suit's multi-layer design provides strong protection against vacuum, radiation, and extreme temperatures, showcasing advanced engineering [6] - The suit's flexibility is enhanced by a bionic structure and adjustable components, allowing for a single suit to be used by multiple astronauts [6] Group 3: Future Developments - New models D and E of the "Feitian" extravehicular suit have been delivered, with an improved operational lifespan of "4 years and 20 times" [3] - The development of the lunar suit is progressing well, leveraging technologies from the extravehicular suit to meet the challenges of lunar exploration [7] - Future designs for extravehicular suits will focus on modularity, lightweight construction, and multi-purpose integration to adapt to various exploration tasks [7][8]