The Cosine Variable Frequency and Amplitude (or Variable Cosine Source) component has a real output $y$ that is a cosinusoidal signal whose frequency and amplitude may be varied by real inputs:

$y\=\mathrm{offset}\+{\mathrm{amplitude}}_{\mathrm{internal}}\cos \left(\mathrm{\phi }\right)$

$\mathrm{der}\left(\mathrm{\phi }\right)\=2\mathrm{\pi }{f}_{\mathrm{internal}}$

${\mathrm{amplitude}}_{\mathrm{internal}}\=\{\begin{array}{cc}\mathrm{constantAmplitude}& \mathrm{useConstantAmplitude}\\ \mathrm{amplitude}& \mathrm{otherwise}\end{array}$

$f_{\mathrm{internal}}\=\{\begin{array}{cc}\mathrm{constantFrequency}& \mathrm{useConstantFrequency}\\ f& \mathrm{otherwise}\end{array}$

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.