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<div class="moz-cite-prefix">Bonjour,<br>
<br>
Le 10/12/2018 à 14:10, VUILLAUME Philippe (SNCF MOBILITES / AGENCE
D'ESSAI FERROVIAIRE / POLE AEF E) a écrit :<br>
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<p class="MsoNormal">Bonjour,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">J’ai un problème de construction de filtre
avec la fonction iir.<o:p></o:p></p>
<p class="MsoNormal">Voici mon code :<o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">Fe</span><span
style="font-size:9.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span
style="color:rosybrown">2000</span><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><i><span
style="font-size:9.0pt;font-family:Courier;color:#64AE64;mso-fareast-language:FR">//paramètres
du filtre Butterworth</span></i><span
style="font-size:9.0pt;font-family:Courier;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:Courier;color:black;mso-fareast-language:FR">n</span><span
style="font-size:9.0pt;font-family:Courier;mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span
style="color:black">eval</span><span style="color:#4A55DB">(</span><span
style="color:#32B9B9">x_dialog</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">'Ordre du filtre Butterworth'</span><span
style="color:black">,</span><span style="color:rosybrown">'6'</span><span
style="color:#4A55DB">))</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:Courier;color:black;mso-fareast-language:FR">fcut</span><span
style="font-size:9.0pt;font-family:Courier;mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span
style="color:black">eval</span><span style="color:#4A55DB">(</span><span
style="color:#32B9B9">x_dialog</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">'Fréquence de coupure en Hz'</span><span
style="color:black">,</span><span style="color:rosybrown">'200'</span><span
style="color:#4A55DB">))</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><i><span
style="font-size:9.0pt;font-family:Courier;color:#64AE64;mso-fareast-language:FR">//fonction
de transfert</span></i><span
style="font-size:9.0pt;font-family:Courier;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:Courier;color:black;mso-fareast-language:FR">hb</span><span
style="font-size:9.0pt;font-family:Courier;mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span
style="color:black">iir</span><span style="color:#4A55DB">(</span><span
style="color:black">n,</span><span style="color:rosybrown">'lp'</span><span
style="color:black">,</span><span style="color:rosybrown">'butt'</span><span
style="color:black">,</span><span style="color:#4A55DB">(</span><span
style="color:black">fcut</span><span style="color:#5C5C5C">/</span><span
style="color:black">Fe</span><span style="color:#4A55DB">)</span><span
style="color:black">,</span><span style="color:#4A55DB">[])</span><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Lorsque je lance chaque ligne séparément
dans la console tout fonctionne mais lorsque je lance ce code
depuis SciNotes, Scilab plante dans le calcul de hb avec ce
message :<o:p></o:p></p>
<p class="MsoNormal">« Scilab 6.0.0 (GUI) a cessé de fonctionner<o:p></o:p></p>
<p class="MsoNormal">Un problème est à l’origine du
dysfonctionnement du programme.<o:p></o:p></p>
<p class="MsoNormal">Fermez le programme. »<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Scilab 6.0.0 sous Windows 10</p>
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<br>
Ce problème de stabilité n'est pas (du tout) lié à iir().<br>
C'est un problème plus général de Scilab 6.0.<br>
<br>
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<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Avez-vous une idée de ce qui ne va pas ?</p>
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<br>
Je suspecte très fortement NewsFeed d'être à l'origine de cette
instabilité.<br>
Malheureusement, ce n'est pas un composant pour lequel
l'installation est optionnelle.<br>
C'est un très gros problème...<br>
<br>
Samuel<br>
<br>
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