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Re: [PSUBS-MAILIST] Reverse engineering in CAD



Hi Steve,

I've not been doing much work on the DynaMechs K350 simulation, but I do
have some clues to follow once I get sometime to work on it.  Mainly, I
need to recalculate the moment of inertia every time I adjust the VBT
(since the mass of the vessel will have changed).

Once I complete the control software for Solo I'll revisit the K350 sim.
It's my (long term) intend that the control software can be interfaced to
the simulator as well.   So you could try out a control setup/configuration
in the simulator, and if you like it, then you can use the same configuration
files to configure the controls of a sub.

Ian.


On Thu, 17 Jun 2004 20:55:35 -0700
Steven Mills <cirtemoeg@juno.com> wrote:

> [ Off Subject ]
> [ Re:Subject: Submersible Design Software 
> Date: Mon, 20 Oct 2003 ]
> 
> Ian,
> 
> were you able to resolve the data conflict and run your model
> thru "DynaMechs" ?
> 
> --Steve
> 
> 
> On Thu, 17 Jun 2004 18:59:17 -0700 Ian Roxborough <irox@ix.netcom.com>
> writes:
> > 
> > Hi Peter,
> > 
> > I don't really know anything about autocad2004, but if it's worth 
> > it's
> > salt then it I'll probably have the following features.
> > 
> > NURBS!
> > 
> > See if your cad/modeling software has Nurbs support (Nurbs are just
> > fancy curves or a fancy word for curves).  You should be able to use
> > the Nurbs tool to create some boat like curves, similar to the ribs
> > of a woodern boat (you may want search drawning Nurbs or curves on
> > the internet or in the library, but if mess around long enough 
> > you'll
> > probably get the hang of it).
> > 
> > Once you have enough curves (draw them a foot a part, or whatever 
> > you
> > think it takes) to get it to start looking boat-ish, then save your
> > work and look for a "skinning" tool.  A "skinning" tool (I've no 
> > idea
> > what it will be called in autocad) should allow you to select all 
> > your
> > curves, then create a skin that fits prefectly over the curves.  
> > You'll
> > probably find that you have to edit the curves a few times before it
> > starts looking correct.
> > 
> > But that's pretty much it.  Not too different from the join the 
> > dots,
> > only with curves.... ;-)
> > 
> > If your doing solid modelling, then hopefully there is tool for 
> > giving
> > the skin 'thickness' or volume.  Otherwise you might have to create 
> > a
> > copy of the hull and shrink it down by a very very small amount and 
> > put
> > it inside the bigger hull skin, then joint the two object together. 
> > The
> > distance between the inner and outer skin determines how thick the 
> > hull
> > will be.
> > 
> > This is how I would tackle the problem, but it's probably worth 
> > noting
> > that the software I use to do this type of thing isn't a true solid
> > modeller.
> > 
> > Hope this helps.
> > 
> > Ian.
> > 
> >.........................cut...............................
> 
> 
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-- 



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