Nom

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 ] ])
 

Parameters

  • 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