Ich habe einige verschiedene Formen für die Gleichung einer Übertragungsfunktion gesehen und frage mich, welche am richtigsten ist und warum? Hängt es vom Filtertyp etc. ab?
Nehmen wir ein Beispiel und seine Übertragungsfunktion:
H( w ) =vÖ( w )vich( w )=R2jw L _R1(R2+ j w L ) +R2jw L _
<a href="https://translate.google.com/website?sl=en&tl=de&hl=en-US&u=https://i.stack.imgur.com/awzWu.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/awzWu.jpg" alt="Filter."></a>
<p></p>
<p><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">Mit etwas Algebra können Sie es in zwei verschiedenen Formen erhalten:</font></font></p>
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display: inline-block;"><span style="display: inline-block; position: relative; width: 12.732em; height: 0px; font-size: 122%;"><span style="position: absolute; clip: rect(1.052em, 1012.73em, 3.688em, -1000em); top: -2.24em; left: 0em;"><span class="mrow" id="MathJax-Span-55"><span class="msubsup" id="MathJax-Span-56"><span style="display: inline-block; position: relative; width: 1.26em; height: 0px;"><span style="position: absolute; clip: rect(3.142em, 1000.89em, 4.153em, -1000em); top: -3.989em; left: 0em;"><span class="mi" id="MathJax-Span-57" style="font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">H</font></font><span style="display: inline-block; overflow: hidden; height: 1px; width: 0.057em;"></span></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; top: -3.839em; left: 0.831em;"><span class="mn" id="MathJax-Span-58" style="font-size: 70.7%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">1</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span></span></span><span class="mo" id="MathJax-Span-59" style="font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">( </font></font></span><span class="mi" id="MathJax-Span-60" style="font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">w </font></font></span><span class="mo" id="MathJax-Span-61" style="font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">) </font></font></span><span class="mo" id="MathJax-Span-62" style="font-family: MathJax_Main; padding-left: 0.278em;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">= </font></font></span><span class="mstyle" id="MathJax-Span-63" style="padding-left: 0.278em;"><span class="mrow" id="MathJax-Span-64"><span class="texatom" id="MathJax-Span-65" style=""><span class="mrow" id="MathJax-Span-66"><span class="mo" id="MathJax-Span-67" style="vertical-align: 0em;"><span style="font-family: MathJax_Size1;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">(</font></font></span></span></span></span></span></span><span class="mfrac" id="MathJax-Span-68"><span style="display: inline-block; position: relative; width: 2.35em; height: 0px; margin-right: 0.12em; margin-left: 0.12em;"><span style="position: absolute; clip: rect(3.342em, 1000.84em, 4.259em, -1000em); top: -4.508em; left: 50%; margin-left: -0.42em;"><span class="msubsup" id="MathJax-Span-69"><span style="display: inline-block; position: relative; width: 0.84em; height: 0px;"><span style="position: absolute; clip: rect(3.342em, 1000.53em, 4.168em, -1000em); top: -3.989em; left: 0em;"><span class="mi" id="MathJax-Span-70" style="font-size: 70.7%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">R</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; top: -3.883em; left: 0.537em;"><span class="mn" id="MathJax-Span-71" style="font-size: 50%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">2</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span></span></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; clip: rect(3.342em, 1002.23em, 4.259em, -1000em); top: -3.594em; left: 50%; margin-left: -1.115em;"><span class="mrow" id="MathJax-Span-72"><span class="msubsup" id="MathJax-Span-73"><span style="display: inline-block; position: relative; width: 0.84em; height: 0px;"><span style="position: absolute; clip: rect(3.342em, 1000.53em, 4.168em, -1000em); top: -3.989em; left: 0em;"><span class="mi" id="MathJax-Span-74" style="font-size: 70.7%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">R</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; top: -3.883em; left: 0.537em;"><span class="mn" id="MathJax-Span-75" style="font-size: 50%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">1</font></font></span><span style="display: inline-block; 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width: 5.002em; height: 0px; margin-right: 0.12em; margin-left: 0.12em;"><span style="position: absolute; clip: rect(3.358em, 1000.78em, 4.297em, -1000em); top: -4.546em; left: 50%; margin-left: -0.399em;"><span class="mrow" id="MathJax-Span-86"><span class="mi" id="MathJax-Span-87" style="font-size: 70.7%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">jw </font></font></span><span class="mi" id="MathJax-Span-88" style="font-size: 70.7%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">_</font></font></span></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; clip: rect(2.976em, 1004.73em, 4.674em, -1000em); top: -3.227em; left: 50%; margin-left: -2.441em;"><span class="mrow" id="MathJax-Span-89"><span class="mi" id="MathJax-Span-90" style="font-size: 70.7%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">j </font></font></span><span class="mi" id="MathJax-Span-91" style="font-size: 70.7%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">w </font></font></span><span class="mo" id="MathJax-Span-92" style="font-size: 70.7%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">+ </font></font></span><span class="mstyle" id="MathJax-Span-93" style=""><span class="mrow" id="MathJax-Span-94"><span class="texatom" id="MathJax-Span-95" style=""><span class="mrow" id="MathJax-Span-96"><span class="mo" id="MathJax-Span-97" style="vertical-align: 0em;"><span style="font-family: MathJax_Size1;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">(</font></font></span></span></span></span></span></span><span class="mfrac" id="MathJax-Span-98"><span style="display: inline-block; position: relative; width: 2.378em; height: 0px; margin-right: 0.12em; margin-left: 0.12em;"><span style="position: absolute; clip: rect(3.484em, 1001.33em, 4.314em, -1000em); 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position: relative; width: 0.667em; height: 0px;"><span style="position: absolute; clip: rect(3.484em, 1000.38em, 4.164em, -1000em); top: -3.989em; left: 0em;"><span class="mi" id="MathJax-Span-104" style="font-size: 50%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">R</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; top: -3.828em; left: 0.38em;"><span class="mn" id="MathJax-Span-105" style="font-size: 50%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">2</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; clip: rect(3.45em, 1002.26em, 4.314em, -1000em); top: -3.628em; left: 50%; margin-left: -1.129em;"><span class="mrow" id="MathJax-Span-106"><span class="mi" id="MathJax-Span-107" style="font-size: 50%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">L </font></font></span><span class="mo" id="MathJax-Span-108" style="font-size: 50%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">(</font></font></span><span class="msubsup" id="MathJax-Span-109"><span style="display: inline-block; position: relative; width: 0.667em; height: 0px;"><span style="position: absolute; clip: rect(3.484em, 1000.38em, 4.164em, -1000em); top: -3.989em; left: 0em;"><span class="mi" id="MathJax-Span-110" style="font-size: 50%; font-family: MathJax_Math-italic;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">R</font></font></span><span style="display: inline-block; width: 0px; height: 3.989em;"></span></span><span style="position: absolute; top: -3.828em; left: 0.38em;"><span class="mn" id="MathJax-Span-111" style="font-size: 50%; font-family: MathJax_Main;"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">1</font></font></span><span style="display: inline-block; 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</math></span></span><script type="math/tex" id="MathJax-Element-3">H_1(w)=\bigl(\frac{R_2}{R_1+R_2}\bigr)\frac{jw}{jw+\bigl(\frac{R_1R_2}{L(R_1+R_2}\bigl)}Wo
R1R2L (R1+R2)
ist der Pol (und
jw _
ist eine Null?).
H2( w ) = (LR1)jw _1 + j (w(R1R2L (R1+R2)))
WoR1R2L (R1+R2)
ist der Pol (undjw _
ist eine Null?).
H1( 0 ) = 0
,H2( 0 ) = 0
,H1( ∞ ) =R2R1+R2
UndH2( ∞ ) =R2R1+R2
.
Fragen:
Sie sind eindeutig gleich (wenn ich alles richtig berechnet habe), aber welche Form ist am richtigsten und am besten zu verwenden? Unterscheidet es sich vom Filtertyp, dh Tief- oder Hochpass usw.? Es scheint einfacher zu bedienenH1
von der Konstante zu lesenR2R1+R2
alsw
Ansatz∞
, obwohl ich das Formular av gesehen habeH2
öfter und es scheint Standard zu sein, dass zwei versuchen, ein "1 + . . .
„im Nenner?
Danke schön!
Defindun
Andi aka
Defindun
Andi aka
Andi aka