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战斗力 鹅
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注册时间 2009-1-19
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在FAA发布调查结论后SpaceX也公布了声明
https://www.spacex.com/updates/index.html
在首飞时Super Heavy后部泄露的推进剂引发了火灾，最终切断了主飞行计算机的连接。导致失去了同大部分发动机的通讯，最终失去了对载具的控制。SpaceX已对发动机和助推器进行了改进，以减少泄露并完成了测试。同时作为一项额外的修正措施，SpaceX也扩大了已有的灭火系统，以应对发动机舱的火灾。
在载具偏离轨迹，失去高度并开始翻滚时，自毁系统自动激活发出了指令，并且按计划引爆了所有爆炸装置。但在自毁系统激活后发生了未预料的延迟，载具最终在发动机点火237.474秒后解体。为了提升系统可靠性，SpaceX已增强并重新取证了自毁系统。
SpaceX还对系统性能进行了全方面改进，尽管这些项目并不涉及首飞中遇到的问题。例如，SpaceX制造并测试了一种热分离系统。二级将点火推离助推器。此外，SpaceX也为助推器的Raptor引擎研发了一种电驱推力矢量控制系统。通过使用全电驱马达，相比传统的液压系统，新系统会有更少的故障点，更有能量效率。
SpaceX也对发射台进行了重大升级，以避免首飞时出现的地基问题。升级包括增强的地基和火焰偏流器。
SEPTEMBER 8, 2023
UPGRADES AHEAD OF STARSHIP’S SECOND FLIGHT TEST
The first flight test of a fully integrated Starship and Super Heavy was a critical step in advancing the capabilities of the most powerful launch system ever developed. Starship’s first flight test provided numerous lessons learned that are directly contributing to several upgrades being made to both the vehicle and ground infrastructure to improve the probability of success on future Starship flights. This rapid iterative development approach has been the basis for all of SpaceX’s major innovative advancements, including Falcon, Dragon, and Starlink. SpaceX has led the investigation efforts following the flight with oversight from the FAA and participation from NASA and the National Transportation and Safety Board.
Starship and Super Heavy successfully lifted off for the first time on April 20, 2023 at 8:33 a.m. CT (13:33:09 UTC) from the orbital launch pad at Starbase in Texas. Starship climbed to a maximum altitude of ~39 km (24 mi) over the Gulf of Mexico. During ascent, the vehicle sustained fires from leaking propellant in the aft end of the Super Heavy booster, which eventually severed connection with the vehicle’s primary flight computer. This led to a loss of communications to the majority of booster engines and, ultimately, control of the vehicle. SpaceX has since implemented leak mitigations and improved testing on both engine and booster hardware. As an additional corrective action, SpaceX has significantly expanded Super Heavy’s pre-existing fire suppression system in order to mitigate against future engine bay fires.
The Autonomous Flight Safety System (AFSS) automatically issued a destruct command, which fired all detonators as expected, after the vehicle deviated from the expected trajectory, lost altitude and began to tumble. After an unexpected delay following AFSS activation, Starship ultimately broke up 237.474 seconds after engine ignition. SpaceX has enhanced and requalified the AFSS to improve system reliability.
SpaceX is also implementing a full suite of system performance upgrades unrelated to any issues observed during the first flight test. For example, SpaceX has built and tested a hot-stage separation system, in which Starship’s second stage engines will ignite to push the ship away from the booster. Additionally, SpaceX has engineered a new electronic Thrust Vector Control (TVC) system for Super Heavy Raptor engines. Using fully electric motors, the new system has fewer potential points of failure and is significantly more energy efficient than traditional hydraulic systems.
SpaceX also made significant upgrades to the orbital launch mount and pad system in order to prevent a recurrence of the pad foundation failure observed during the first flight test. These upgrades include significant reinforcements to the pad foundation and the addition of a flame deflector, which SpaceX has successfully tested multiple times.
Testing development flight hardware in a flight environment is what enables our teams to quickly learn and execute design changes and hardware upgrades to improve the probability of success in the future. We learned a tremendous amount about the vehicle and ground systems during Starship’s first flight test. Recursive improvement is essential as we work to build a fully reusable launch system capable of carrying satellites, payloads, crew, and cargo to a variety of orbits and Earth, lunar, or Martian landing sites.
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楼主: Ichthy
沪公网安备 31010702007642号 )
发表于 2023-9-6 10:57
，原因未知。