PSN-L Email List Message

Subject: Re: similar to a folded pendulum except using feedback
From: Brett Nordgren Brett3mr@.............
Date: Sun, 17 Feb 2008 22:16:26 -0500


At 05:14 PM 2/17/2008 -0500, you wrote:
>     In effect, what you have described, is to take advantage of the same 
> property that is used by the folded pendulum, which
>comprises both a `regular' pendulum and also an 'inverted 
>pendulum.  Separated from each other and connected by a rigid
>horizontal boom, their relative influence ('restoring' from the one, and 
>'destoring' from the other) is determined by how close
>the inertial mass is placed to one or the other.
>     Because the folded pendulum can be made to have a very long period, 
> upper valuve being limited by mesoanelastic complexity,
>it appears clear then, that the feedback drive of the primary pendulum by 
>an inverted secondary one is capable (for ideal
>meaterials) of very long period indeed, and therefore very great 
>sensitivity.  Moreover, since the adverse effects of material
>problems can be essentially eliminated by means of the feedback, I see 
>this as a really attractive idea to try and demonstrate!
>Are there any takers?  (meaning folks like Brett who know how to make 
>control systems work right).
>     Randall

Always happy to help, especially if someone would like to volunteer for the 
construction part.



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