# Model a first order system with input delay - Padé approximant?

**URL:** <https://scilab.discourse.group/t/model-a-first-order-system-with-input-delay-pade-approximant/388>\
**Category:** Modeling and simulation\
**Created:** [February 7, 2024, 10:36am UTC](https://scilab.discourse.group/t/model-a-first-order-system-with-input-delay-pade-approximant/388 "2024-02-07T10:36:32Z")\
**Posts on this page:** 1\
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**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\
**Post date:** [March 6, 2024, 8:31am UTC](https://scilab.discourse.group/t/model-a-first-order-system-with-input-delay-pade-approximant/388/6 "2024-03-06T08:31:35Z")

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> [@scelles](#):
>
> What about integrating it into Scilab?

Yes, e.g. in the cacsd module, but a help page is also needed (in the spirit of [Padé approximation of models with time delay - MATLAB pade - MathWorks France](https://fr.mathworks.com/help/control/ref/dynamicsystem.pade.html)). In the source of pade() you should control the type of input arguments by using the new mechanism (see [https://scilab.discourse.group/t/new-language-feature-arguments-introduced-in-scilab-2024-0-0](https://scilab.discourse.group/t/new-language-feature-arguments-introduced-in-scilab-2024-0-0)). When you have all these elements working in your fork you can create a merge request.

S.

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