Applets:Periodendauer periodischer Signale: Difference between revisions
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{{LntExplicitLoadMathjax}} | |||
<p> | |||
{{BlaueBox|TEXT= | |||
$x(t) = A_1\cdot cos\Big(2\pi f_1\cdot t- \frac{2\pi}{360}\cdot \phi_1\Big)+A_2\cdot cos\Big(2\pi f_2\cdot t- \frac{2\pi}{360}\cdot \phi_2\Big)$ | |||
}} | |||
</p> | |||
<html> | <html> | ||
<head> | <head> | ||
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<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jsxgraph/0.99.6/jsxgraphcore.js"></script> | <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jsxgraph/0.99.6/jsxgraphcore.js"></script> | ||
<!-- <script type="text/javascript" src="https://en.lntwww.de/MathJax/unpacked/MathJax.js?config=TeX-AMS-MML_HTMLorMML-full,local/mwMathJaxConfig"></script> --> | <!-- <script type="text/javascript" src="https://en.lntwww.de/MathJax/unpacked/MathJax.js?config=TeX-AMS-MML_HTMLorMML-full,local/mwMathJaxConfig"></script> --> | ||
<style> | <style> | ||
.button { | .button { | ||
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background-color: #939393; | background-color: #939393; | ||
} | } | ||
table { | table { | ||
border-collapse: separate; | border-collapse: separate; | ||
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<body | <body> | ||
<!-- Resetbutton, Checkbox, Regler und Plots --> | <form id="jxgForm"> | ||
<p> | <!-- Resetbutton, Checkbox, Regler und Plots --> | ||
<p> | |||
<input type="checkbox" id="gridbox" onclick="showgrid();" checked> <label for="gridbox">Gitterlinien Zeigen</label> | |||
</p> | <button class="button" onclick="rst()">Reset</button> | ||
<div id="cnfBoxHtml" class="jxgbox" style="width:600px; height:100px; float:top; margin:-10px 20px 100px 0px;"></div> | </p> | ||
<div id="pltBoxHtml" class="jxgbox" style="width:600px; height:600px; border:1px solid black; margin:-10px 20px 100px 0px;"></div> | <div id="cnfBoxHtml" class="jxgbox" style="width:600px; height:100px; float:top; margin:-10px 20px 100px 0px;"></div> | ||
<div id="pltBoxHtml" class="jxgbox" style="width:600px; height:600px; border:1px solid black; margin:-10px 20px 100px 0px;"></div> | |||
</form> | |||
<!-- Ausgabefelder --> | <!-- Ausgabefelder --> | ||
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<script type="text/javascript"> | <script type="text/javascript"> | ||
// Grundeinstellungen der beiden Applets | |||
JXG.Options.text.useMathJax = true; | |||
var cnfBox = JXG.JSXGraph.initBoard('cnfBoxHtml', { | |||
showCopyright: false, showNavigation: false, axis: false, | |||
grid: false, zoom: { enabled: false }, pan: { enabled: false }, | |||
boundingbox: [-1, 2.2, 12.4, -2.2] | |||
}); | |||
var pltBox = JXG.JSXGraph.initBoard('pltBoxHtml', { | |||
showCopyright: false, axis: false, | |||
zoom: { factorX: 1.1, factorY: 1.1, wheel: true, needshift: true, eps: 0.1 }, | |||
grid: false, boundingbox: [-0.5, 2.2, 12.4, -2.2] | |||
}); | |||
cnfBox.addChild(pltBox); | |||
// Einstellungen der Achsen | |||
xaxis = pltBox.create('axis', [[0, 0], [1, 0]], { | |||
name: '$\\dfrac{t}{T}$', | |||
withLabel: true, label: { position: 'rt', offset: [-25, -10] } | |||
}); | |||
yaxis = pltBox.create('axis', [[0, 0], [0, 1]], { | |||
name: '$x(t)$', | |||
withLabel: true, label: { position: 'rt', offset: [10, -5] } | |||
}); | |||
// Erstellen der Schieberegler | |||
a = cnfBox.create('slider', [ [-0.7, 1.5], [3, 1.5], [0, 0.5, 1] ], { | |||
suffixlabel: '$A_1=$', | |||
unitLabel: 'V', snapWidth: 0.01 | |||
}), | }), | ||
c = cnfBox.create('slider', [ [-0.7, -0.5], [3, -0.5], [-180, 0, 180] ], { | b = cnfBox.create('slider', [ [-0.7, 0.5], [3, 0.5], [0, 1, 10] ], { | ||
suffixlabel: '$f_1=$', | |||
unitLabel: 'kHz', snapWidth: 0.1 | |||
}), | |||
c = cnfBox.create('slider', [ [-0.7, -0.5], [3, -0.5], [-180, 0, 180] ], { | |||
suffixlabel: '$\\phi_1=$', | |||
unitLabel: 'Grad', snapWidth: 5 | |||
}), | |||
d = cnfBox.create('slider', [ [6, 1.5], [9.7, 1.5], [0, 0.5, 1] ], { | |||
suffixlabel: '$A_2=$', | |||
unitLabel: 'V', snapWidth: 0.01 | |||
}), | |||
e = cnfBox.create('slider', [ [6, 0.5], [9.7, 0.5], [0, 2, 10] ], { | |||
suffixlabel: '$f_2=$', | |||
unitLabel: 'kHz', snapWidth: 0.1 | |||
}), | |||
g = cnfBox.create('slider', [ [6, -0.5], [9.7, -0.5], [-180, 90, 180] ], { | |||
suffixlabel: '$\\phi_2=$', | |||
unitLabel: 'Grad', snapWidth: 5 | |||
}), | |||
t = cnfBox.create('slider', [ [-0.7, -1.5], [3, -1.5], [0, 0, 10] ], { | |||
suffixlabel: '$t=$', | |||
unitLabel: 's', snapWidth: 0.2 | |||
}), | |||
// Definition der Funktion | |||
signaldarstellung = pltBox.create('functiongraph', [function(x) { | |||
return (a.Value() * Math.cos(2 * Math.PI * b.Value() * x - 2 * Math.PI * c.Value() / 360) + d.Value() * Math.cos(2 * Math.PI * e.Value() * x - 2 * Math.PI * g.Value() / 360)) | |||
}], { | |||
strokeColor: "red" | |||
}); | |||
// Definition des Punktes p_T0, des Hilfspunktes p_T0h und der Geraden l_T0 für Periodendauer T_0 | |||
p_T0 = pltBox.create('point', [ | |||
function() { | |||
return (Math.round(getT0() * 100) / 100); | |||
}, | |||
function() { | |||
return a.Value() * Math.cos(2 * Math.PI * b.Value() * (Math.round(getT0() * 100) / 100) - 2 * Math.PI * c.Value() / 360) + | |||
d.Value() * Math.cos(2 * Math.PI * e.Value() * (Math.round(getT0() * 100) / 100) - 2 * Math.PI * g.Value() / 360); | |||
}], | |||
{ color: "blue", fixed: true, label: false, size: 1, name: '' } | |||
); | |||
p_T0h = pltBox.create('point', | |||
[function() { return (Math.round(getT0() * 100) / 100); }, 2], | |||
{ visible: false, color: "blue", fixed: true, label: false, size: 1, name: '' } | |||
); | |||
l_T0 = pltBox.create('line', [p_T0, p_T0h]) | |||
// Bestimmung des Wertes T_0 mit der Funktion von Siebenwirth | |||
setInterval(function() { | |||
document.getElementById("T_0").innerHTML = Math.round(getT0() * 100) / 100; | |||
}, 50); | |||
function isInt(n) { | |||
return n % 1 === 0; | |||
} | |||
function getT0() { | |||
var A, B, C, Q; | |||
if (b.Value() < e.Value()) { | |||
A = b.Value(); | |||
B = e.Value(); | |||
} else { | |||
B = b.Value(); | |||
A = e.Value(); | |||
} | } | ||
// console.log('Berechne T0 mit A=' + A, 'B=' + B); | |||
for (var x = 1; x <= 100; x++) { | |||
C = A / x; | |||
Q = B / C; | |||
// console.log(x + '. Durchgang: C = ' + C, 'Q = ' + Q); | |||
if (isInt(Q)) { | |||
// console.log('Q ist eine Ganzzahl!!! T0 ist damit ', 1 / C); | |||
return 1 / C; | |||
} | } | ||
if (x === 10) { | |||
return 10; | |||
} | } | ||
if ((1 / C) > 10) | |||
return 10 | |||
} | |||
} | |||
// Ausgabe des Wertes x(t) | |||
setInterval(function() { | |||
document.getElementById("x(t)").innerHTML = Math.round((a.Value() * Math.cos(2 * Math.PI * b.Value() * t.Value() - 2 * Math.PI * c.Value() / 360) + d.Value() * Math.cos(2 * Math.PI * e.Value() * t.Value() - 2 * Math.PI * g.Value() / | |||
360)) * 1000) / 1000; | |||
}, 50); | |||
// Ausgabe des Wertes x(t+T_0) | |||
setInterval(function() { | |||
document.getElementById("x(t+T_0)").innerHTML = Math.round((a.Value() * Math.cos(2 * Math.PI * b.Value() * (t.Value() + Math.round(getT0() * 1000) / 1000) - c.Value()) + d.Value() * Math.cos(2 * Math.PI * e.Value() * (t.Value() + | |||
Math.round(getT0() * 1000) / 1000) - g.Value())) * 1000) / 1000; | |||
}, 50); | |||
// Ausgabe des Wertes x(t+2T_0) | |||
setInterval(function() { | |||
document.getElementById("x(t+2T_0)").innerHTML = Math.round((a.Value() * Math.cos(2 * Math.PI * b.Value() * (t.Value() + 2 * Math.round(getT0() * 1000) / 1000) - c.Value()) + d.Value() * Math.cos(2 * Math.PI * e.Value() * (t.Value() + | |||
2 * Math.round(getT0() * 1000) / 1000) - g.Value())) * 1000) / 1000; | |||
}, 50); | |||
// Ausgabe des Wertes x_max | |||
setInterval(function() { | |||
var x = new Array(50000); | |||
for (var i = 0; i < 50001; i++) { | |||
x[i] = Math.round((a.Value() * Math.cos(2 * Math.PI * b.Value() * (i / 1000) - 2 * Math.PI * c.Value() / 360) + d.Value() * Math.cos(2 * Math.PI * e.Value() * (i / 1000) - 2 * Math.PI * g.Value() / 360)) * 1000) / 1000; | |||
} | } | ||
document.getElementById("x_max").innerHTML = Math.max.apply(Math, x); | |||
}, 50); | |||
// Definition der Funktion zum An- und Ausschalten des Koordinatengitters | // Definition der Funktion zum An- und Ausschalten des Koordinatengitters | ||
function showgrid() { | function showgrid() { | ||
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} | } | ||
pltBox.fullUpdate(); | pltBox.fullUpdate(); | ||
}; | |||
// Definition des Reset-Buttons | |||
function rst() { | |||
document.getElementById("jxgForm").reset(); | |||
}; | }; | ||
</script> | </script> | ||
</body> | </body> | ||
</html> | </html> | ||
{{Display}} | {{Display}} | ||
Revision as of 09:54, 18 September 2017
$x(t) = A_1\cdot cos\Big(2\pi f_1\cdot t- \frac{2\pi}{360}\cdot \phi_1\Big)+A_2\cdot cos\Big(2\pi f_2\cdot t- \frac{2\pi}{360}\cdot \phi_2\Big)$
| $x(t)$= | $x(t+ T_0)$= | $x(t+2T_0)$= |
| $x_{\text{max}}$= | $T_0$= |