gamitg

Scilab Function
Last update : 12/01/2004

gamitg - H-infinity gamma iterations

### Calling Sequence

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

### Parameters

- `G`: `syslin` list (plant realization )
- `r`: 1x2 row vector (dimension of `G22`)
- `prec`: desired relative accuracy on the norm
- `option`: string `'t'`
- `gopt`: real scalar, optimal H-infinity gain

### Description

`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`, `h_inf`,

### Author

P. Gahinet