[R-sig-dyn-mod] Hybrid simulation of nonlinear ode and discrete state machine

[John Harrold]

You can try using Laplace transforms to convert your second order
differential equation into two coupled first order ODEs:

http://www.me.utexas.edu/~bryant/courses/me344/DownloadFiles/LectureNotes/Laplace+TransferFunctions.pdf

https://www.youtube.com/watch?v=AC5o436J_0o



On Fri, Dec 9, 2016 at 12:44 PM, Eike Petersen <eike.petersen at uni-luebeck.de
> wrote:

> Dear Thomas,
>
> My apologies; I wasn't being clear here - what I meant was nonlinearity in
> the derivatives, i.e., something like y'^2 + y' = f(y, t). I guess what I
> should have asked for is capability to solve fully implicit ODEs.
>
> Kind regards,
> Eike
>
> -----Original Message-----
> From: R-sig-dynamic-models [mailto:r-sig-dynamic-models-
> bounces at r-project.org] On Behalf Of Thomas Petzoldt
> Sent: Freitag, 9. Dezember 2016 17:39
> To: Special Interest Group for Dynamic Simulation Models in R <
> r-sig-dynamic-models at r-project.org>
> Cc: Jan Grasshoff <j.grasshoff at uni-luebeck.de>
> Subject: Re: [R-sig-dyn-mod] Hybrid simulation of nonlinear ode and
> discrete state machine
>
> Dear Eike,
>
> all solvers of deSolve are able to solve nonlinear ODE systems.
>
> Regards,
>
> Thomas
>
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-- 
-------------------------------------
John M. Harrold
john.m.harrold _at_gmail
-------------------------------------

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