[ATM] RE: Testing the limits of ATM technology

["lou krajci" <loukrajci@comcast.net>]

>From: "Arjan te Marvelde" <arjan.te.marvelde@hetnet.nl>

>The French site is very good. I had seen it before but never spent the time
>to go into the details.
>I see that if you use counterweights, the actual position of the support is
>no longer important, it will adjust to wherever the back of the mirro is,
>and excert precisely the right amount of force. The remaining mirror weigth
>is distributed over the three fixed points, or the bipods. However, in case
>of the CELT, I don't see that the 18 other points are astatic. Are they?

No, I assume that CELT will probably use computer controlled, electric
powered actuators...which is how the big professionals do it these days.

>I believe there is a remark somewhere in the tail of the CELT chapter that
>says the actual mechanic construction of the bipods is still to be done.

Yes, the document was a design proposal and initial analysis.  However, I
believe the concepts are sound...it's just that final details need to be
worked out and tested before large scale production.

>Do you have a Nastran licence?

No.  I've used GRAPE for my primitive analysis of truss designs and a few
other simple tasks.  See:
http://overton.tamu.edu/aset/krajci/
and specifically
http://overton.tamu.edu/aset/krajci/rocker-analysis/rocker-analysis.htm
and
http://overton.tamu.edu/aset/krajci/fork-analysis/fork-analysis.htm
and
http://overton.tamu.edu/aset/krajci/truss-analysis/truss-analysis.htm
for some examples of my analysis with GRAPE.

Tom Krajci
Albuquerque, New Mexico
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