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March 2nd, 2019, 06:56 AM   #1
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Waveform

Hi All,

Have been trying to simulate the following waveform but struggling to work out what waveform it approx. represents?

0.91sin (2∏ x 100t) + 0.31 sin (2∏ x 300t) + 0.19 sin (2∏ x 500t) + 0.14 sin (2∏ x 700t) + 0.04 sin (2∏ x 900t)

Thanks for any guidance.
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March 2nd, 2019, 07:53 AM   #2
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Quote:
Originally Posted by NAC54321 View Post
Hi All,

Have been trying to simulate the following waveform but struggling to work out what waveform it approx. represents?

0.91sin (2∏ x 100t) + 0.31 sin (2∏ x 300t) + 0.19 sin (2∏ x 500t) + 0.14 sin (2∏ x 700t) + 0.04 sin (2∏ x 900t)

Thanks for any guidance.
It looks like the start of a Fourier Sine series but I have no idea how to find the function it is supposedly representing.

-Dan
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March 2nd, 2019, 10:49 AM   #3
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It's 5 terms into being a square wave.

The amplitude is about 1.4.. it's probably intended to be $\sqrt{2}$
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Last edited by romsek; March 2nd, 2019 at 10:53 AM.
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March 3rd, 2019, 11:34 PM   #4
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And a frequency of 100Hz
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