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[MATHCAD] Differential Equation Solvers...
| [MATHCAD] Differential Equation Solvers... |
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Author: Robert Garner
Posted: Wed, 9 Sep 1998 09:30:35 +0100
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MC7 has a good range of differential equation solvers such as RKFIXED
etc. which in my experience of engineering applications give accurate
results, fairly quickly.
However, the documentation of these functions, both in the paper manual
and the Resource Centre etc, is very sparse, in the case of systems of
equations, especially for orders more than one. E.g. in the manual only
one example of order 2 is given with little or no explanation. (I do
realise that space is limited.)
Does anyone at Adept have any documentation of how to use the RKFIXED
function with the "general case" of a system of 'n' equations of order
'm'? For example what are the limits?
The general form can be inferred from the example(s), but I think
confidence in the results must be higher if the "general " form was
explicitly available.
Regards,
Bob Garner
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Bob Garner CEng. (Mechanical Engineer)
Interfleet Technology Ltd.
Railway Technical Centre,
London Road, DERBY DE24 8UP, UK
email: "garner.r" "mailto:garner.r" >
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| Re: [MATHCAD] Differential Equation Solvers... |
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Author: Byrge Birkeland
Posted: Wed, 09 Sep 1998 12:38:51 +0200
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At 09:30 09.09.98 +0100, you wrote:
>Does anyone at Adept have any documentation of how to use the RKFIXED
>function with the "general case" of a system of 'n' equations of order
>'m'?
In my book "Mathematics with with Mathcad", chapter 8, (published by
Studentlitteratur / Chartwell Bratt ISBN 91-44-00228-9 and ISBN
0-86238-458-3) I have some examples, e.g. damped pendulum, ballistics.
Regards
Byrge Birkeland
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