PSN-L Email List Message

Subject: Re: Crossed wire mass pendulum signal extension/s
From: ChrisAtUpw@.......
Date: Sat, 20 Sep 2008 01:07:43 EDT


In a message dated 2008/09/20, paleoartifact@......... writes:

> The X-suspension sounds most interesting; especially the adjustable period 

Hi Meredith,

       You have two fairly wide plates with two wires from the top right to 
the bottom left corners and from the top left to the bottom right corners. The 
mass is on the end of a vertical stalk attached to the centre of the bottom 
plate and it lies between the  two plates. You adjust the vertical position of 
the mass to vary the period.
       The mass moves laterally and rotates in the vertical plane. You might 
also consider monitoring the position of the bottom plate, rather than the 
mass itself. The damping could be positioned in a similar manner. 
       
       Regards,

       Chris Chapman   
In a me=
ssage dated 2008/09/20, paleoartifact@......... writes:

The X-suspension sounds most in= teresting; especially the adjustable period


Hi Meredith,

       You have two fairly wide plates with tw= o wires from the top right to the bottom left corners and from the top left=20= to the bottom right corners. The mass is on the end of a vertical stalk atta= ched to the centre of the bottom plate and it lies between the  two pla= tes. You adjust the vertical position of the mass to vary the period.
       The mass moves laterally and rotates in= the vertical plane. You might also consider monitoring the position of the=20= bottom plate, rather than the mass itself. The damping could be positioned i= n a similar manner.
      
       Regards,

       Chris Chapman

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