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- Newsgroups: comp.robotics
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!news.ils.nwu.edu!mccoy
- From: mccoy@ils.nwu.edu (Jim Mccoy)
- Subject: Re: How to Explore Mars
- Message-ID: <1993Jan8.222437.10042@ils.nwu.edu>
- Sender: usenet@ils.nwu.edu (Mr. usenet)
- Nntp-Posting-Host: aristotle.ils.nwu.edu
- Organization: The Institute for the Learning Sciences
- References: <HAGERMAN.93Jan7224103@rx7.ece.cmu.edu>
- Distribution: comp
- Date: Fri, 8 Jan 1993 22:24:37 GMT
- Lines: 44
-
- In article <HAGERMAN.93Jan7224103@rx7.ece.cmu.edu> hagerman@ece.cmu.edu (John Hagerman) writes:
- >
- >There has been some discussion about the tradeoffs between using one
- >large robot and many small robots for planetary exploration. Has the
- >Erebus experiment changed the opinion of anyone here? I don't want to
- >restrict attention to the specific results; for example, I don't think
- >we learned anything new about fault tolerance. Rather, I'm hoping for
- >new thoughts engendered by considering the experiment in general. In
- >my mind, for example, the experiment supports large robots for such
- >use since a fairly standard large robot design could be fairly easily
- >modified to conceivably navigate the volcano, and it seems less likely
- >that the same would hold for small robots. Any other thoughts?
-
- Actually, I came up with a completely different opinion based upon the
- failure in Antarctica. If anything, I believe this adventure has shown the
- key weakness in the single robot proposals: if something goes wrong you are
- completely screwed. The scenario in Antarctica was similar to a Mars
- exploration in that it is remote and a hostile environment, but one big
- difference is that there will be no one around to crawl to the rim of a
- canyon to reset the computers or perform other maintenance on Mars. There
- will be no modification of robot design once the mission to explore Mars
- begins, you only get to use what you take with you. Please remember that
- the people paying for the exploration are not going to appreciate it if we
- end up sending Mars it's biggest paperweight...
-
- If anything, the failure of Erebus seems to point to the disadvantages of
- using a single large robot to explore hostile, unknown environments. With
- a single robot you have a single point of failure for the entire mission,
- if your robot ends up with machanical difficulties or other problems you
- have just wasted millions. With multiple smaller robots you still have
- other robots to continue exploration and you have the option of making the
- smaller robots capable of some specialization to explore unique
- environments.
-
- The Erebus experiment seemed to provide nothing to support the single robot
- proposals, I am really curious as to how anyone could find support for them
- under the circumstances of this situation...
-
- jim
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