首次在轨开展寿命评估 舱外航天服是航天员在太空出舱活动中的核心装备，保障着航天员的生命安全和高效作业。中国空间站 舱外航天服是第二代"飞天"舱外航天服，按照设计标准，使用寿命为"在轨贮存3年，其间出舱使用次数 不小于15次"。 与陈冬一同创造"纪录"的，还有他身上穿着的舱外航天服B——它已累计保障20次出舱任务，成为中国 空间站首套实现"4年20次"延寿目标的舱外航天服。 2021年7月4日，在神舟十二号任务中，航天员刘伯明、汤洪波首次身着"飞天"舱外航天服A和B出舱， 并顺利完成出舱任务。随着时间的推移，至2024年初，在轨飞行的舱外航天服已经接近"3年15次"的寿 命设计指标极限。 航天服还能不能继续用？为了准确评估舱外服的剩余寿命，科研团队制定了科学合理的寿命评估、健康 监测方案和在轨检测方法。通过深入挖掘在轨和地面试验数据，科研团队开展了大量材料级和产品级的 验证试验，实现了舱外航天服在轨健康与延寿的动态精准评估。经评估，舱外服B状态稳定良好，从而 成为中国首次在轨开展寿命评估并延寿使用的飞行产品。 日前，神舟二十号乘组圆满完成第三次出舱活动。航天员陈冬、王杰完成了空间站空间碎片防护装置及 舱外辅助设 ...

Core Points - The Shenzhou-20 crew successfully completed their third extravehicular activity, with astronaut Chen Dong setting a record for the most extravehicular activities by a Chinese astronaut, totaling six [2] - The extravehicular suit B worn by Chen Dong has supported 20 extravehicular missions, achieving the goal of "4 years and 20 times" lifespan extension, marking a significant milestone for China's space station [2][4] Summary by Sections Extravehicular Suit Performance - The second-generation "Feitian" extravehicular suit is designed for a lifespan of "3 years with at least 15 extravehicular activities" [3] - As of early 2024, the suit has approached the limit of "3 years and 15 times" usage, prompting a need for a lifespan assessment [3] - A scientific evaluation and health monitoring plan was developed to assess the remaining lifespan of the suit, which has been confirmed to be in good condition [3] Technological Advancements - The "Feitian" extravehicular suit represents advanced technology and is crucial for ensuring astronaut safety and operational efficiency during extravehicular activities [5] - The suit features a multi-layer design for protection against vacuum, radiation, and extreme temperatures, with various layers serving specific functions [5] - The suit's flexibility is enhanced by a bionic structure and integrated helmet and torso design, allowing for better movement [5][6] Future Developments - Two new second-generation "Feitian" extravehicular suits (D and E) have been delivered to the space station, with an improved operational lifespan of "4 years and 20 times" [4] - The development of the lunar suit is progressing well, with plans for a manned moon landing by 2030, leveraging technologies from the "Feitian" suit [7] - The design philosophy for future suits includes modularity, lightweight construction, and multi-purpose integration to meet diverse mission requirements [7][8]

央视网消息：舱外航天服是航天员在太空出舱活动过程中的核心装备，保障着航天员在舱外活动中的生命安全和高效作业。8月15日，神 舟二十号乘组圆满完成第三次出舱活动。此次任务中，航天员陈冬身着的空间站舱外服B已累计保障了20次出舱任务，成为我国空间站首套实 现"4年20次"延寿目标的舱外服。中国空间站舱外服也成为我国首个在轨开展寿命评估并延寿使用的飞行产品。 11名航天员8次任务中接力使用舱外服B 2021年7月4日，航天员刘伯明、汤洪波身着中国自主研制的新一代"飞天"舱外航天服，先后从天和核心舱节点舱成功出舱，完成了在机械臂上 安装脚限位器和舱外工作台等工作。两名航天员还在机械臂支持下，相互配合开展了空间站舱外设备组装作业。这次出舱，刘伯明穿着的是红 色饰带的舱外服A，汤洪波穿着的是蓝色饰带的舱外服B。在近两个小时的太空漫步中，飞天舱外服展现了良好的使用工况。 空间站舱外服也成为首个在轨开展寿命评估并延寿使用的飞行产品。退役的舱外服B将会回到地球，继续完成它后续的使命。 首个在轨开展寿命评估并延寿使用飞行产品 4年来，先后有11名航天员在8次载人飞行任务中接力使用过舱外服B。经科研人员动态精准评估，舱外服B的状态 ...

Core Points - The Shenzhou-20 crew successfully completed their third extravehicular activity, marking a significant milestone for China's space program [1] - The space station's extravehicular suit B has achieved a remarkable record of 20 extravehicular tasks over four years, surpassing its initial design life of three years and 15 uses [1][2] - The second-generation "Feitian" extravehicular suits D and E have been delivered to the Chinese space station and are set to be used in future extravehicular activities [2] Group 1 - The extravehicular suit B has been used by 11 astronauts across 8 manned missions, demonstrating its stability and reliability for ongoing space station operations [1] - The suit is crucial for ensuring the safety and efficiency of astronauts during extravehicular activities, highlighting its role in the success of the space station's construction and operation [1] - The second-generation suits have advanced technologies that enhance longevity, safety, and operational efficiency compared to the first generation [2] Group 2 - A scientific and reasonable lifespan assessment and health monitoring plan has been developed to evaluate the remaining lifespan of the extravehicular suits [2] - The successful dynamic assessment of the suit's health and lifespan ensures its safe and reliable use in orbit, making it the first flight product to undergo such evaluations [2] - The recent supply mission included two new second-generation suits, which have passed inspection and are ready for deployment in upcoming missions [2]