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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>eng</LANGUAGE>
  <TITLE>bstap</TITLE>
  <TYPE>Scilab Function</TYPE>
  <DATE>April 1993</DATE>
  <SHORT_DESCRIPTION name="bstap"> hankel approximant</SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
    <CALLING_SEQUENCE_ITEM>[Q]=bstap(Sl)  </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
    <PARAM_INDENT>
      <PARAM_ITEM>
        <PARAM_NAME>sl</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: linear system (<VERB>syslin</VERB> list) assumed continuous-time and anti-stable.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>Q</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: best stable approximation of <VERB>Sl</VERB> (<VERB>syslin</VERB> list).</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
    </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
    <P>
    Computes the best approximant <VERB>Q</VERB> of the linear system <VERB>Sl</VERB></P>
    <P>
    where</P>
    <P>
    ||T||</P>
    <P>
    is the  H-infinity norm of the Hankel operator associated with <VERB>Sl</VERB>.</P>
  </DESCRIPTION>
  <SEE_ALSO>
    <SEE_ALSO_ITEM>
      <LINK>syslin</LINK>
    </SEE_ALSO_ITEM>
  </SEE_ALSO>
</MAN>
