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- From: cb1p+@andrew.cmu.edu (Chris Beasley)
- Newsgroups: comp.robotics
- Subject: Re: How to Explore Mars
- Message-ID: <cfIA1DS00YUo05pmpn@andrew.cmu.edu>
- Date: 10 Jan 93 14:33:19 GMT
- Article-I.D.: andrew.cfIA1DS00YUo05pmpn
- References: <HAGERMAN.93Jan7224103@rx7.ece.cmu.edu>
- <1993Jan8.222437.10042@ils.nwu.edu>
- Distribution: comp
- Organization: Sponsored account, Carnegie Mellon, Pittsburgh, PA
- Lines: 41
- In-Reply-To: <1993Jan8.222437.10042@ils.nwu.edu>
-
- Actually, as one of the people who was offered an opportunity to work
- on the Erebus project ( I turned it down for personal reasons ) I
- think I can offer more insight into the "failure" of the Dante
- explorer robot.
-
- Due to what I see as political and organizational reasons,
- the project was supposed to proceed from start to finish in
- one year. Once the negotiation and contract signing stuff was taken
- care of, that time line had been shrunk to just ten months. Ten
- months to take a VERY complex problem through all phases from design
- to actual mission operation. That's a hell of a short time even for
- the fine folks at the FRC who are used to difficult deadlines.
-
- One of the simplifing decisions that was made to help meet the
- schedule was to exclude any forms of redundancy in the system that
- would cope in the event of any single point failures such as the
- fiber optic link failure that resulted in the mission being scrubbed.
-
- In retrospect this may have been a "bad" decision but it seems that
- without it there would have been no way to complete any portion of
- the project in the time allotted. In a real mission there would
- almost certainly be a more generous time/money budget and a
- careful evaluation of the possible single point failure modes would
- have been made. Ample redundancy would be designed into all mission
- critical systems that would allow operation to continue under a
- variety of failure scenarios.
-
- Overall, I think the Erebus project was a qualified success, in
- that it must have been one of the most rapid development
- projects ever to have met with even partial success in
- such a hostile environment. Not just the final mission environment but
- the pressured environment under which the development project was
- carried out.
-
- Hopefully, they will get another shot at it next "summer" with
- a machine that has had the advantage of an additional
- year of unhurried development.
-
- My hat is off to the Erebus team who came through under intense
- pressure ( and temperature 8^) ).
- Cb
-