<?xml version="1.0" encoding="UTF-8"?>
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<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="des2tf">
    <refnamediv>
        <refname>des2tf</refname>
        <refpurpose>記述子から伝達関数への変換</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>呼び出し手順</title>
        <synopsis>[S]=des2tf(sl)
            [Bfs,Bis,chis]=des2tf(sl)
        </synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>パラメータ</title>
        <variablelist>
            <varlistentry>
                <term>sl</term>
                <listitem>
                    <para>リスト (記述子形式の線形システム)</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>Bfs, Bis</term>
                <listitem>
                    <para>多項式行列</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>chis</term>
                <listitem>
                    <para>多項式</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>S</term>
                <listitem>
                    <para>有理行列</para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>説明</title>
        <para>
            記述子形式の線形システム<literal>Sl=list('des',A,B,C,D,E)</literal>を指定すると,
            <literal>des2tf</literal> は <literal>sl</literal> を
            その伝達関数表現に変換します:
        </para>
        <programlisting role=""><![CDATA[
S=C*(s*E-A)^(-1)*B+D
 ]]></programlisting>
        <para>
            引数3個でコールされた場合, <literal>des2tf</literal> は,
            2つの多項式行列
            <literal>Bfs</literal> および <literal>Bis</literal> と
            次のような多項式<literal>chis</literal>を返します:
        </para>
        <programlisting role=""><![CDATA[
S=Bfs/chis - Bis
 ]]></programlisting>
        <para>
            <literal>chis</literal> は <literal>(s*E-A)</literal> の行列式
            (xcative定数に一致)です;
        </para>
    </refsection>
    <refsection>
        <title>例</title>
        <programlisting role="example"><![CDATA[
s=poly(0,'s');
G=[1/(s+1),s;1+s^2,3*s^3];
Descrip=tf2des(G);Tf1=des2tf(Descrip)
Descrip2=tf2des(G,"withD");Tf2=des2tf(Descrip2)
[A,B,C,D,E]=Descrip2(2:6);Tf3=C*inv(s*E-A)*B+D
 ]]></programlisting>
    </refsection>
    <refsection role="see also">
        <title>参照</title>
        <simplelist type="inline">
            <member>
                <link linkend="glever">glever</link>
            </member>
            <member>
                <link linkend="pol2des">pol2des</link>
            </member>
            <member>
                <link linkend="tf2des">tf2des</link>
            </member>
            <member>
                <link linkend="ss2tf">ss2tf</link>
            </member>
            <member>
                <link linkend="des2ss">des2ss</link>
            </member>
            <member>
                <link linkend="rowshuff">rowshuff</link>
            </member>
        </simplelist>
    </refsection>
</refentry>
