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欧空局局长在博客里宣称火星探测器 “半软着陆”

(2016-10-21 09:52:47) 下一个

 

Woerners局长在博客里宣称着陆器“半软着陆”（semi-soft touchdown），成功80%，整个ExoMars 2016项目成功96%（数学真好）

Some people have asked about the success of the 2016 mission so far. For the number-crunchers among them the following observation may be helpful:

The importance of TGO and EDM can be described as 80% vs. 20%, respectively. Since we obtained at least 80% of the data during the descent, the overall success rate can be calculated as follows: 80+20*0.8 = 96%. All in all, a very positive result.

So to sum up where we stand, we have achieved a successful orbit insertion of TGO, ready to perform science and act as a relay station for ExoMars 2020 ground science. Not only that, but we have received a large quantity of data from the lander giving us crucial information to help us perform a successful landing of the next mission.


http://blogs.esa.int/janwoerner/ ... ing-is-an-art-form/

 
Exomars 2020还缺3亿欧元的预算缺口，ESA需要在年底欧洲议会召开前给出故障分析，说服议员们使用同一套GNC的着陆器不会再出现类似问题。
PS：这可能也是局长Woerner为首的部分ESA官员在公开场合极力淡化着陆器硬着陆的原因。
But ESA will have to present their case at a meeting of the agency’s member states in December when officials ask European governments for around $330 million (300 million euros) to make up for a shortfall in funding for the construction of the ExoMars 2020 rover.

http://spaceflightnow.com/2016/10/20/last-data-from-schiaparelli-mars-lander-hold-clues-to-what-went-wrong/
 
 
Andrea Accomazzo（Spacecraft Operations Manager, ESA）关于故障初步分析的结论：超音速伞比原计划提前~50s脱离，反推火箭只工作了3s就关机（原计划工作~30s）。技术人员还需要花费几天时间分析TGO回传的遥测数据，寻找故障原因。
PS：看起来问题出在GNC或者某些传感器（压力传感器，加速度计，雷达高度计等）上，如果降落伞提前50s脱离，反推火箭点火时的速度可能会超出设计范围，这可能导致其因燃烧不稳定而提前关机或整个着陆平台失稳，而后者可以解释载波信号的消失。
 
 
欧洲这些官员真是脸皮厚啊，特别是那个Jan Wörner说什么夏帕雷里就是为了2020的计划blabla，我们可以学习很多为未来打好基础blabla，没有信号你学个鬼啊，猎犬2号的失败你们好好学了没？看了都气。上次玉兔故障了BBC可是冷嘲热讽啊，我们好歹成功降落而且走起来了。
 
呵呵 欧洲是准备把第二成功着陆火星国家荣誉让给中国了，中国 加油！

 

 

 

 

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