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Scilab manual >> CACSD > arhnk

arhnk

Hankel norm approximant

Calling Sequence

[slm]=arhnk(sl,ord,[tol])

Arguments

sl

linear system (syslin list)

ord

integer, order of the approximant

tol

threshold for rank determination in equil1

Description

computes slm, the optimal Hankel norm approximant of the stable continuous-time linear system sl with matrices [A,B,C,D].

Examples

A=diag([-1,-2,-3,-4,-5]);B=rand(5,1);C=rand(1,5);
sl=syslin('c',A,B,C);
slapprox=arhnk(sl,2);
[nk,W]=hankelsv(sl);nk
[nkred,Wred]=hankelsv(slapprox);nkred
<< abinv CACSD arl2 >>

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Last updated:
Wed Jan 26 16:23:41 CET 2011