rowregul

rowregul — removing poles and zeros at infinity

Calling sequence

[Stmp,Ws]=rowregul(Sl,alfa,beta)

`Sl,Stmp`	: `syslin` lists
`alfa,beta`	: real numbers (new pole and zero positions)

computes a postfilter Ws such that Stmp=Ws*Sl is proper and with full rank D matrix.

Poles at infinity of Sl are moved to alfa;

Zeros at infinity of Sl are moved to beta;

Sl is a assumed to be a right invertible linear system (syslin list) in state-space representation with possibly a polynomial D matrix.

This function is the dual of colregul (see function code).



s=%s;
w=[1/s,0;s/(s^3+2),2/s];
Sl=tf2ss(w);
[Stmp,Ws]=rowregul(Sl,-1,-2);
Stmp('D')     // D matrix of Stmp
clean(ss2tf(Stmp))

F. D. , R. N. ;