2ND MIDTERM SOLUTION FALL O4

# 2ND MIDTERM SOLUTION FALL O4 - EE4580 Test Fall 2004...

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EE4580 Test — Fall 2004 Suppose that the plant model is given by G ( s )= 10( s +1)( s + 10) s ( s 2 + s + 25) . 1. Sketch straightline approximation for magnitude Bode plot. 2. Find errors at corner frequencies, and make corrections with dashed line. 3. Repeat 1. for phase plot. 4. Estimate crossover frequency, and ﬁnd the phase margin. 1

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Solution to Midterm II 1. The low and high frequencies are ω L =1 / 10 = 0 . 1 H =10 × 10 = 100 ,G L =20log 10 100 2 . 5 = 32dB . The initial slope is - 20dB / dec due to one pole at the origin. The straight line sketch for the magnitude Bode plot is shown in the solid line.
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## This note was uploaded on 01/23/2012 for the course EE 4580 taught by Professor Gu during the Fall '10 term at LSU.

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2ND MIDTERM SOLUTION FALL O4 - EE4580 Test Fall 2004...

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