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ss2des Scilab Group Scilab Function ss2des
NAME
ss2des - (polynomial) state-space to descriptor form
CALLING SEQUENCE
S=ss2des(Sl)
S=ss2des(Sl,flag)
PARAMETERS
Sl : syslin list: proper or improper linear system.
flag : character string "withD"
S : list
DESCRIPTION
Given the linear system in state-space representation Sl (syslin list),
with a D matrix which is either polynomial or constant, but not zero
ss2des returns a descriptor system as list('des',A,B,C,0,E) such that:
Sl=C*(s*E-A)^(-1)*B
If the flag "withD" is given, S=list('des',A,B,C,D,E) with a D matrix
of maximal rank.
EXAMPLE
s=poly(0,'s');
G=[1/(s+1),s;1+s^2,3*s^3];Sl=tf2ss(G);
S=ss2des(Sl)
S1=ss2des(Sl,"withD")
Des=des2ss(S);Des(5)=clean(Des(5))
Des1=des2ss(S1)
SEE ALSO
pol2des, tf2des, des2ss
AUTHOR
F. D.
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