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Scilab help >> CACSD (Computer Aided Control Systems Design) > gamitg


H-infinity gamma iterations for continuous time systems

Calling Sequence

[gopt]=gamitg(G,r,prec [,options]);



a continuous time dynamical system (plant realization).


1x2 row vector (dimension of G22)


desired relative accuracy on the norm


string 't'


real scalar, optimal H-infinity gain


gopt=gamitg(G,r,prec [,options]) returns the H-infinity optimal gain gopt.

G contains the state-space matrices [A,B,C,D] of the plant with the usual partitions:

B = ( B1 , B2 ) ,    C = ( C1 ) ,    D = ( D11  D12)
                         ( C2 )          ( D21  D22)

These partitions are implicitly given in r: r(1) and r(2) are the dimensions of D22 (rows x columns)

With option='t', gamitg traces each bisection step, i.e., displays the lower and upper bounds and the current test point.

See Also

  • ccontrg — Central H-infinity continuous time controller
  • h_inf — Continuous time H-infinity (central) controller


P. Gahinet


5.4.0 Sl is now checked for continuous time linear dynamical system. This modification has been introduced by this commit
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Last updated:
Mon Oct 01 17:34:46 CEST 2012