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Scilab manual >> CACSD > kpure

# kpure

### 呼び出し手順

```K=kpure(sys [,tol])
[K,R]=kpure(sys [,tol])```

### パラメータ

sys

SISO線形システム (syslin)

tol

K

R

### 説明

`K=kpure(sys)` は, `K(i)`によるフィードバックを有するシステム `sys` (`sys/.K(i)`) が虚軸に極を有するようなゲイン `K`を計算します.

### 例

```num=real(poly([-1+%i, -1-%i, -1+8*%i  -1-8*%i],'s'));
den=real(poly([0.5 0.5  -6+7*%i  -6-7*%i  -3 -7 -11],'s'));
h=num/den;

[K,Y]=kpure(h)
clf();evans(h)
plot(real(Y),imag(Y),'+r')

num=real(poly([-1+%i*1, -1-%i*1, 2+%i*8  2-%i*8 -2.5+%i*13 -2.5-%i*13],'s'));
den=real(poly([1 1 3+%i*3 3-%i*3 -15+%i*7  -15-%i*7  -3 -7 -11],'s'));
h=num/den;

[K,Y]=kpure(h)
clf();evans(h,100000)
plot(real(Y),imag(Y),'+r')```

### 作者

Serge Steer, INRIA

### 参照

 << invsyslin CACSD krac2 >>

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