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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uunet.ca!synapse!lee.matheson
- From: lee.matheson@synapse.org (Lee Matheson)
- Newsgroups: sci.space
- Subject: Re: Automated space station construction
- Message-ID: <1095.3328.uupcb@synapse.org>
- Date: 9 Nov 92 23:38:00 GMT
- Distribution: world
- Organization: SYNAPSE BBS - GATINEAU, QUEBEC - 819-561-4321
- Reply-To: lee.matheson@synapse.org (Lee Matheson)
- Lines: 75
-
- To: kcarroll@zoo.toronto.edu (Kieran A. Carroll)
- From: lee.matheson@syanpse.org (Lee Matheson)
-
- Kieran,
-
- I saw your e-mail reply, and felt compelled to add to it. Hope
- you don't mind. I've recently started work on the Space Station
- program, ... but while I have added some more detailed notes,
- I am far from an expert. Anyway, comments are added below:
-
- KAC>>Is anyone looking into robots with very limited autonomy? That is,
- KAC>>under direction from a human, but able to execute instructions on
- KAC>>their own for periods of, say, ten seconds?
- KAC>> Frank Crary
- KAC>> CU Boulder
-
- KAC>Yes. The Canadian Space Agency (who are developing the Mobile
- KAC>Servicing System for SSF) are spending about CDN$50M per year
- KAC>on research into automating various aspects of MSS ....
- KAC> ..... The idea is that
- KAC>the baseline MSS will use control technologies very similar to
- KAC>those used in the Canadarm, in order to expedite development.
- KAC>Then, improvements will be added over the life of SSF as part of
- KAC>the ``Evolutionary MSS'' program (funding still TBC). The work being
- KAC>done now is more in the nature of up-front research and development,
- KAC>so that the technologies that currently look interesting will have
- KAC>been tested out prior to setting the requirements for the next
- KAC>MSS increment.
-
- Actually, CDR for the Space Station Remote Manipulator System (SSRMS),
- which is the name for the Space Station robotic arm, is scheduled for
- December of this year. Hence its design is pretty far advanced.
-
- In addition CSA is actively planning on a second robotic device, smaller
- but more dexterous than the large Space Station arm. This smaller
- robotic device is referred to as the "Special Purpose Dexterous
- Manipulator", or "SPDM" for short. SPDM has two very small arms, and
- it is currently conceptually planned to operate on the end of the
- Space Station Remote Manipulator System, or possibly operate on its
- own on special "power data grapple fixtures" that are located
- throughout the Space Station. I think the Japanese Experimental
- Module will also have its own robotic arm, but I don't know anything
- about that.
-
- KAC>Actually, some of that work looks likely to see
- KAC>earlier use, perhaps even incorporation into the baseline MSS:
- KAC>the CSA is looking into adding ground-control capability into baseline
- KAC>MSS, largely to provide a means for dealing with the predicted
- KAC>external maintenance task backlog (the existence of this backlog
- KAC>was the main conclusion of the ``Fisher/Price''
- KAC>report a couple of years ago; this report was probably the straw
- KAC>that broke the back of the previous SSF configuration, and led to the
- KAC>1991 re-design). With ground control, MSS could be operated almost
- KAC>full-time during the period between flight 3 (when MSS is launched)
- KAC>and PMC (when SSF will be permanently inhabited); without ground control,
- KAC>it could be operated during this period only when a shuttle was docked,
- KAC>which will be for something like 2 weeks out of every 3 months.
-
- Operating from the ground would be a real challenge. I believe that
- there are several technical, and schedule related hurdles to over come
- before ground operation is possible, ... one of which, I believe,
- is that the Space Station video system may not be up and running until
- around flight 5. Without video it is pretty hard to operate the SSRMS
- from the ground. I believe there are other technical hurdles to over
- come as well, but the video could be a real show stopper, until
- flights 5/6 (around when MTC, "man tended capability" starts).
- However if the ground system is in place, between MTC (flight-6) and
- PMC (around flight 11, and please pardon the acronymns),
- it may be feasible to operate the SSRMS from the ground when the
- Shuttle is on the ground (and hence no astronauts) are in the station.
-
- Lee Matheson, Ottawa
- ---
- . OLX 2.1 TD . Apathy Error: Don't bother striking any key.
-
-