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Aug 25 2005, 11:22 AM
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http://news.bbc.co.uk/1/hi/sci/tech/4180840.stm
Europe has fixed on a concept for its next mission to land on the Red Planet. It aims to send a single robot rover to the Martian surface along with another, stationary, science package. |
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Jun 13 2006, 09:58 PM
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
Of course, with custom realtime OS's - the processing overheads for your average spacecraft are only a fraction of those for the OS's used by those 'mainstream' processors. I've not actually heard of computing performance being a limiting factor for spacecraft - but I may have missed such reports.
Doug |
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Jun 13 2006, 10:29 PM
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
. I've not actually heard of computing performance being a limiting factor for spacecraft - but I may have missed such reports. For most spacecraft they aren't but the power consumption of the RAD6000 on the MER's is a significant percentage of the daily power budget. The numbers that I have gleaned from the various web sources are not necessarily reliable but they seem to broadly agree that the "processing" consumes about ~30% of the power budget on average and more than that for compute intensive activities like VISODM. A standard VISODM "step" is around 75cm of drive (15 seconds) followed by 2-3 minutes of computing. I think that the drive motors consume around 30W but even if they consume 100W at full tilt and the analysis only take 2 minutes then a VISODM drive segment consumes 50% more power on computing than it does on actual motion. |
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