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.TH cls2dls 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
cls2dls - bilinear transform
.SH CALLING SEQUENCE
.nf
[sl1]=cls2dls(sl,T [,fp])
.fi
.SH PARAMETERS
.TP
sl,sl1
: linear systems (\fVsyslin\fR lists)
.TP
T
: real number, the sampling period
.TP
fp
: prevarping frequency in hertz
.SH DESCRIPTION
given \fVsl=[A,B,C,D]\fR (\fVsyslin\fR list),a continuous time system
\fVcls2dls\fR returns the sampled system obtained by the
bilinear transform \fVs=(2/T)*(z-1)/(z+1)\fR.
.SH EXAMPLE
.nf
s=poly(0,'s');z=poly(0,'z');
sl=syslin('c',(s+1)/(s^2-5*s+2)); //Continuous-time system in transfer form
slss=tf2ss(sl); //Now in state-space form
sl1=cls2dls(slss,0.2); //sl1= output of cls2dls
sl1t=ss2tf(sl1) // Converts in transfer form
sl2=horner(sl,(2/0.2)*(z-1)/(z+1)) //Compare sl2 and sl1
.fi
.SH SEE ALSO
horner
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