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# steadycos

Finds an equilibrium state of a general dynamical system described by a xcos diagram

### Calling Sequence

[X,U,Y,XP]=steadycos(scs_m,X,U,Y,Indx,Indu,Indy [,Indxp [,param ] ])

### Module

### Description

This function finds the steady state for a given system described by a xcos diagram. The diagram consists in general of a Super block with input and output port blocks. The steady state concern only the continuous-time dynamics.

[X,U,Y,XP]=steadycos(scs_m,X,U,Y,Indx,Indu,Indy [,Indxp [,param ] ])

### Arguments

**scs_m :**a xcos data structure**X :**column vector. Continuous state. Can be set to [] if zero.**U :**column vector. Input. Can be set to [] if zero.**Y :**column vector. Output. Can be set to [] if zero.**Indx :**index of entries of X that are not fixed. If all can vary, set to 1:$**Indu :**index of entries of U that are not fixed. If all can vary, set to 1:$**Indy :**index of entries of Y that are not fixed. If all can vary, set to 1:$**Indxp :**index of entries of XP (derivative of x) that need not be zero. If all can vary, set to 1:$. Default [].**param :**list with two elements (default list(1.d-6,0)). param(1): scalar. Perturbation level for linearization; the following variation is used del([x;u])_i = param(1)+param(1)*1d-4*abs([x;u])_i. param(2): scalar. Time t.**X :**steady state X**U :**stationary input U**Y :**output corresponding to steady state found**XP :**derivative of the state corresponding to steady state found

### File content

SCI/modules/scicos/macros/scicos_auto/steadycos.sci

### See Also

### Authors

**Ramine Nikoukhah** - INRIA

## Comments

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