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[scilab.git] / scilab / modules / cacsd / help / ja_JP / evans.xml
1 <?xml version="1.0" encoding="UTF-8"?>
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13 <refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" version="5.0-subset Scilab" xml:lang="ja" xml:id="evans">
14     <refnamediv>
15         <refname>evans</refname>
16         <refpurpose>エバンス根軌跡</refpurpose>
17     </refnamediv>
18     <refsynopsisdiv>
19         <title>呼び出し手順</title>
20         <synopsis>evans(H [,kmax])</synopsis>
21     </refsynopsisdiv>
22     <refsection>
23         <title>引数</title>
24         <variablelist>
25             <varlistentry>
26                 <term>H</term>
27                 <listitem>
28                     <para>
29                         伝達関数または状態空間表現で指定した
30                         SISO線形システム (参照: <link linkend="syslin">syslin</link>).
31                     </para>
32                 </listitem>
33             </varlistentry>
34             <varlistentry>
35                 <term>kmax</term>
36                 <listitem>
37                     <para>実数 (プロットに用いるゲインの最大値)</para>
38                 </listitem>
39             </varlistentry>
40         </variablelist>
41     </refsection>
42     <refsection>
43         <title>説明</title>
44         <para>
45             状態空間または伝達形式 H(s)のSISO線形システム
46             (<link linkend="syslin">syslin</link>)のエバンス根軌跡を出力します.
47             これは,複素平面における
48             <literal>1+k*H(s)=1+k*N(s)/D(s)</literal>の根軌跡です.
49             選択された点のゲイン<literal>k &lt;= kmax</literal>に関して,
50             <literal>D(s)+k*N(s)</literal>の根の虚部が実部に対してプロットされます.
51         </para>
52         <para>
53             根軌跡の指定した点におけるゲインを得るには,
54             <link linkend="datatips">データティップ</link>マネージャを
55             アクティブにし,根軌跡の任意の点をクリックします.
56         </para>
57     </refsection>
58     <refsection>
59         <title>例</title>
60         <programlisting role="example"><![CDATA[ 
61     H=syslin('c',352*poly(-5,'s')/poly([0,0,2000,200,25,1],'s','c'));
62     clf();evans(H,100);sgrid()
63     [Ki,s]=kpure(H) // Gains that give pure imaginary closed loop poles
64     plot([real(s) real(s)],[imag(s) -imag(s)],'*r')
65
66     [Kr,s]=krac2(H)
67     ]]></programlisting>
68         <para>
69             <inlinemediaobject>
70                 <imageobject>
71                     <imagedata fileref="../images/evans.svg"/>
72                 </imageobject>
73             </inlinemediaobject>
74         </para>
75     </refsection>
76     <refsection role="see also">
77         <title>参照</title>
78         <simplelist type="inline">
79             <member>
80                 <link linkend="syslin">syslin</link>
81             </member>
82             <member>
83                 <link linkend="sgrid">sgrid</link>
84             </member>
85             <member>
86                 <link linkend="zgrid">zgrid</link>
87             </member>
88             <member>
89                 <link linkend="kpure">kpure</link>
90             </member>
91             <member>
92                 <link linkend="krac2">krac2</link>
93             </member>
94             <member>
95                 <link linkend="datatips">datatips</link>
96             </member>
97         </simplelist>
98     </refsection>
99 </refentry>