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Manuel Scilab >> xcos > Batch functions > 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 ] ])`

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

Authors

Ramine Nikoukhah - INRIA