[Scilab-users] Problems with Scilab- Xcos simulations (Algebraic loop / Derivative block).

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Marcus Vinicius Pereira de Souza Marcus Vinicius Pereira de Souza
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[Scilab-users] Problems with Scilab- Xcos simulations (Algebraic loop / Derivative block).

Dear all,
I'm trying to do a simulation involving a system of ordinary differential equations. However, in working out the block diagram, I came across an algebraic loop problem.

To solve this problem, I made a new arrangement of the equations and then it was necessary to include a derivative block.
Two new problems have appeared: 1) the initial value of the output signal does not match the value obtained by the initial value theorem and 2) the signal has a strong oscillation (probably due to high frequencies).
Can anyone help me solve these issues? Attached, the. Thank you very much.

 





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Marcus Vinicius Pereira de Souza, D.Sc. (Eng.)
Prof. do Ens. Bas. Tec. Tecnológico
CEFET/RJ | Campus Valença-RJ
Cel: +55 32 9 8436 9695 (TIM - Wapp)

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EDOs.pdf (46K) Download Attachment
5SLA_AtividadeXcos.zcos (8K) Download Attachment
=?UTF-8?b?c2ltdWxhY2FvNVNMQS5zY2U=?= (2K) Download Attachment
mottelet mottelet
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Re: Problems with Scilab- Xcos simulations (Algebraic loop / Derivative block).

The system described in your EDOS.ps file can be written in implicit form,

A*[dy1/dt; dy2/dt] = F(y1,y2)

but here you have A =[1 -1; -2 2], i.e. A is singular. I am not sure that; at least under this form, your system is well-posed.

S.

Le 08/04/2019 à 22:13, Marcus Vinicius Pereira de Souza a écrit :
Dear all,
I'm trying to do a simulation involving a system of ordinary differential equations. However, in working out the block diagram, I came across an algebraic loop problem.

To solve this problem, I made a new arrangement of the equations and then it was necessary to include a derivative block.
Two new problems have appeared: 1) the initial value of the output signal does not match the value obtained by the initial value theorem and 2) the signal has a strong oscillation (probably due to high frequencies).
Can anyone help me solve these issues? Attached, the. Thank you very much.

 




--
Marcus Vinicius Pereira de Souza, D.Sc. (Eng.)
Prof. do Ens. Bas. Tec. Tecnológico
CEFET/RJ | Campus Valença-RJ
Cel: +55 32 9 8436 9695 (TIM - Wapp)

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[hidden email]
https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/lists.scilab.org/mailman/listinfo/users

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