
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Transcribed Image Text:1
s+a
s+b
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The block diagram above shows two transfer functions cascaded in series. The transfer
function II(s) of the combined system is known as a lag compensator in controls system design if a < b.
Suppose a 100 and b = 10,000.
(a) Give the frequency response function G(w) = II (jw)
(b) Please describe its asymptotic behavior (the value if constant, or the slope) for the following three
regimes:
i. low-frequency w <a,
ii. intermediate frequency a<w<b, and
iii. high frequency, w > b.
(c) Sketch the Bode magnitude and phase plots, using decibels as the unit of magnitude and degrees
as the unit of phase
(d) Suppose the system is driven by a sinusoid.
i. If the sinusoid's frequency is 10 Hz, is it amplified, attenuated, or approximately the same?
ii. If the sinusoid's frequency is 500 Hz, is it amplified, attenuated, or approximately the same?
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