[ODE] units - Sugested Units List

[Jaroslav Sinecky]

You can choose freely and independently units for mass, length and time. The
others are dependent, for example power = mass/time^2; if you input mass in
kg and time in s, you have to input power in N. If you input mass in tonnes,
have to input power in kN (or kN*m for engine torque).

This is actually not about ODE, it's about physical modeling.

Cheers,
Jaroslav


> -----Original Message-----
> From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf
> Of Alex Green
> Sent: Tuesday, September 06, 2005 8:42 AM
> To: Megan Fox
> Cc: kave Aryan; ode at q12.org
> Subject: Re: [ODE] units - Sugested Units List
>
>
> The units may not have names but they are related to one another in an SI
> style fashion?
>
> For example if I was to model my 1983 Holden VH Commodore (A typical
> student car in Australia) in ODE:
>
> ODE Mass	1   (tonne)
> ODE length	4.5 (meters)
> ODE Motor Power	300 (newton/m)
>
> That would not behave like my car!
>
> Someone who is familiar with ODE should put together a 'Suggested Units'
> list as this question comes up often..
> It would be the best way to make the unit relationships clear.
>
> Thanks -alex
>
>
> Megan Fox wrote:
> > It uses whatever units you put into the system - for instance, if you
> > decide your weight values are kilograms and your units are meters and
> > your time input is seconds, the force values would be in newtons.
> >
> > There are no set units, there are only the assumptions the user makes.
> >  The system is doing "just math," and just assumes the units on all
> > the values you hand it are consistent.
> >
> > On 9/3/05, kave Aryan <kave_ar23 at yahoo.com> wrote:
> >
> >>Hi,
> >>I am new to ODE, could someone tell me which unit
> >>system ODE uses? SI or something else?
> >>In particular what is force unit in ODE? Newton or
> >>Pound or ...?
> >>
> >>
> >>--
> >>Kave Aryan
> >>
> >>
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