nasa 重返月球

Senior NASA management unanimously approved the preliminary design review of the planned Ares I rocket that would launch astronauts into space by 2015 and back to the moon by 2020.
Next year there will be another narrowly focused "delta" preliminary design review for one pending engineering problem: too much shaking after launch.
This is the first preliminary design review approval for a rocket to carry astronauts since 1973, when the space shuttle passed the same stage, said Steve Cook, NASA's Ares projects manager.
These reviews are to make sure that the broad design, plans and software mesh properly and pass early safety questions. A more detailed test, a critical design review, is scheduled for March 2011.
Most of the rocket is not built yet.
"This is where we wrap the entire vehicle together to say we have a sound design from stem to stern," Cook said in a Wednesday evening teleconference. "It's really a big step in our journey to launch."
NASA engineers said last month that they had figured out how to fix the remaining shaking issue with giant shock absorbers, but still more work is needed before that can pass review.
About 10 percent of the problems that engineers brought up are still to be resolved but do not require separate reviews, including noise problems and questions whether the rocket could fly through rough weather, especially lightning, Cook said. NASA also is looking at potential problems that could come when the lower part of the rocket separates.
The Orion crew capsule, which will sit on top of the Ares I, will have its preliminary design review in late 2009.
One issue raised was that engineers were able to shrink the bottom part of the rocket by 8 inches, and they have to make sure that the launch platform design is also shrunk by that much. It is a matter mostly of paperwork, Cook said.
NASA is spending about $3 billion a year on the return-to-the moon program.

NASA的高管们一致通过了ARES I 型火箭的原始设计审查。该火箭计划于2015年升空并于2015年运送宇航员重返月球。
明年专家们还将对原始设计方案进行修改以专门解决火箭发射时的振动问题。
Steve Cook，NASA负责ARES项目的经理说：“这是自1973年以来，美国首次通过载人火箭的原始设计审核，当时正值航天飞机刚通过原始设计审核。”
通过该审查意味着火箭的总体设计和规划，以及软件系统匹配良好，并通过了初步的安全检测。2011年三月会对该计划进行一次更细致的测评和决定性的设计审核。
目前，火箭的大部分设备还未进入制造阶段。
Steve Cook在周三晚的一个电话会议中说：“我们认为整个火箭的设计从头到尾都很好。通过审查是迈向火箭发射的一大步。”
NASA 的工程师上月曾说过，他们已经知道如何解决火箭发射时的巨大震动问题，但要通过原始设计审查还需更多的努力。
目前，工程师们提交的问题中尚有10%需要解决，包括了噪音问题，严酷天气下的发射安全问题，尤其是如何应对闪电，但这些问题不需要独立的审查。NASA 也在关注助推火箭分离后可能存在的问题。
ARES 火箭将搭载ORION 载人舱，后者将于2009年末进行原始设计审查。
目前的问题之一是工程师已经将火箭底部瘦身了8英寸，因此他们必须对发射平台做同样的瘦身处理。幸好这只是在图纸上进行修改而已。
为了重返月球，NASA每年将花费30亿美圆用于相关计划。Senior NASA management unanimously approved the preliminary design review of the planned Ares I rocket that would launch astronauts into space by 2015 and back to the moon by 2020.
Next year there will be another narrowly focused "delta" preliminary design review for one pending engineering problem: too much shaking after launch.
This is the first preliminary design review approval for a rocket to carry astronauts since 1973, when the space shuttle passed the same stage, said Steve Cook, NASA's Ares projects manager.
These reviews are to make sure that the broad design, plans and software mesh properly and pass early safety questions. A more detailed test, a critical design review, is scheduled for March 2011.
Most of the rocket is not built yet.
"This is where we wrap the entire vehicle together to say we have a sound design from stem to stern," Cook said in a Wednesday evening teleconference. "It's really a big step in our journey to launch."
NASA engineers said last month that they had figured out how to fix the remaining shaking issue with giant shock absorbers, but still more work is needed before that can pass review.
About 10 percent of the problems that engineers brought up are still to be resolved but do not require separate reviews, including noise problems and questions whether the rocket could fly through rough weather, especially lightning, Cook said. NASA also is looking at potential problems that could come when the lower part of the rocket separates.
The Orion crew capsule, which will sit on top of the Ares I, will have its preliminary design review in late 2009.
One issue raised was that engineers were able to shrink the bottom part of the rocket by 8 inches, and they have to make sure that the launch platform design is also shrunk by that much. It is a matter mostly of paperwork, Cook said.
NASA is spending about $3 billion a year on the return-to-the moon program.

NASA的高管们一致通过了ARES I 型火箭的原始设计审查。该火箭计划于2015年升空并于2015年运送宇航员重返月球。
明年专家们还将对原始设计方案进行修改以专门解决火箭发射时的振动问题。
Steve Cook，NASA负责ARES项目的经理说：“这是自1973年以来，美国首次通过载人火箭的原始设计审核，当时正值航天飞机刚通过原始设计审核。”
通过该审查意味着火箭的总体设计和规划，以及软件系统匹配良好，并通过了初步的安全检测。2011年三月会对该计划进行一次更细致的测评和决定性的设计审核。
目前，火箭的大部分设备还未进入制造阶段。
Steve Cook在周三晚的一个电话会议中说：“我们认为整个火箭的设计从头到尾都很好。通过审查是迈向火箭发射的一大步。”
NASA 的工程师上月曾说过，他们已经知道如何解决火箭发射时的巨大震动问题，但要通过原始设计审查还需更多的努力。
目前，工程师们提交的问题中尚有10%需要解决，包括了噪音问题，严酷天气下的发射安全问题，尤其是如何应对闪电，但这些问题不需要独立的审查。NASA 也在关注助推火箭分离后可能存在的问题。
ARES 火箭将搭载ORION 载人舱，后者将于2009年末进行原始设计审查。
目前的问题之一是工程师已经将火箭底部瘦身了8英寸，因此他们必须对发射平台做同样的瘦身处理。幸好这只是在图纸上进行修改而已。
为了重返月球，NASA每年将花费30亿美圆用于相关计划。