PSN-L Email List Message

Subject: Shackleford-Gundersen design questions
From: R&L Thompson rlthompson@.................
Date: Thu, 19 Sep 2002 17:39:19 -0230


    I'm back on the list, I don't remember when I went off the list, but
it had been such a difficult year for workload that I hadn't though
about missing mail.

    Hopefully, I'll find a little more time to experiment this year.  My
current project is based on the Shackleford-Gundersen design, and I have
a few questions about the design.

     I'd like some help with the following questions:
- what is a practical pendulum length
- what way would the mass of the pendulum affect performance.
I'm assuming that there is some relationship between the pendulum mass
the amount of force feedback, is there a rule of thumb?  (I'm not found
doing the math).  Hopefully, the feedback loop gain adjustment is simply

a matter of setting the gain just to the point that oscillation is
induced, and then backing it off, will that work?


            Ron T.

R & L Thompson,
Gander, Newfoundland, Canada,
rlthompson@................. ,
"Who are these that fly as a cloud, and as the doves to their window?"
Is 60:8


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