* Bug #12795 fixed - Cacsd doc: typo fixes
[scilab.git] / scilab / modules / cacsd / help / ja_JP / p_margin.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" xmlns:scilab="http://www.scilab.org" xml:lang="ja" xml:id="p_margin">
14     <refnamediv>
15         <refname>p_margin</refname>
16         <refpurpose>位相余裕および位相交差周波数</refpurpose>
17     </refnamediv>
18     <refsynopsisdiv>
19         <title>呼び出し手順</title>
20         <synopsis>
21             [phm,fr] = p_margin(h)
22             phm=p_margin(h)
23         </synopsis>
24     </refsynopsisdiv>
25     <refsection>
26         <title>パラメータ</title>
27         <variablelist>
28             <varlistentry>
29                 <term>h</term>
30                 <listitem>
31                     <para>
32                         SISO線形システム (参照 :<link linkend="syslin">syslin</link>).
33                     </para>
34                 </listitem>
35             </varlistentry>
36             <varlistentry>
37                 <term>phm</term>
38                 <listitem>
39                     <para>位相余裕 (存在する場合)または空の行列.</para>
40                 </listitem>
41             </varlistentry>
42             <varlistentry>
43                 <term>fr</term>
44                 <listitem>
45                     <para>位相交差周波数 (単位:Hz)または空の行列.</para>
46                 </listitem>
47             </varlistentry>
48         </variablelist>
49     </refsection>
50     <refsection>
51         <title>説明</title>
52         <para>
53             連続または離散時間SISO線形システムを
54             指定すると,<literal>p_margin</literal>は<literal>h</literal>の
55             位相余裕 <literal>phm</literal> (単位:度)および
56             位相交差周波数 <literal>fr</literal> (単位:Hz)を返します.
57         </para>
58         <para>
59             位相余裕は, <literal>h</literal>のナイキスト線図において
60             単位円を通過する周波数における位相を表します.
61             言い換えると,
62             位相余裕は,<literal>h</literal> のゲインが1となった時,
63             <literal>h</literal>の周波数応答の位相と-180度の
64             差を表します.
65         </para>
66         <para>このアルゴリズムは、多項式の求解ルーチンを使用して
67             以下の方程式を解いています:
68         </para>
69         <variablelist>
70             <varlistentry>
71                 <term>h(s)*h(-s)=1</term>
72                 <listitem>
73                     <para> 連続時間システムの場合.</para>
74                 </listitem>
75             </varlistentry>
76             <varlistentry>
77                 <term>h(z)*h(1/z)=1</term>
78                 <listitem>
79                     <para> 離散時間システムの場合.</para>
80                 </listitem>
81             </varlistentry>
82         </variablelist>
83     </refsection>
84     <refsection>
85         <title>例</title>
86         <programlisting role="example"><![CDATA[
87 //連続時間系の場合
88 h=syslin('c',-1+%s,3+2*%s+%s^2)
89 [p,fr]=p_margin(h)
90 [p,fr]=p_margin(h+0.7)
91 show_margins(h+0.7,'nyquist')
92
93 //離散時間系の場合
94 h = syslin(0.1,0.04798*%z+0.0464,%z^2-1.81*%z+0.9048);//ok
95 [p ,f]=p_margin(h)
96 show_margins(h,'nyquist')
97  ]]></programlisting>
98     </refsection>
99     <refsection role="see also">
100         <title>参照</title>
101         <simplelist type="inline">
102             <member>
103                 <link linkend="g_margin">g_margin</link>
104             </member>
105             <member>
106                 <link linkend="show_margins">show_margins</link>
107             </member>
108             <member>
109                 <link linkend="repfreq">repfreq</link>
110             </member>
111             <member>
112                 <link linkend="black">black</link>
113             </member>
114             <member>
115                 <link linkend="bode">bode</link>
116             </member>
117             <member>
118                 <link linkend="chart">chart</link>
119             </member>
120             <member>
121                 <link linkend="nyquist">nyquist</link>
122             </member>
123         </simplelist>
124     </refsection>
125 </refentry>