Answer to HW Problem 26.1 and 26.2 ES205
Factor the polynomials in the transfer functions to obtain the standard form for sketching:
(a)
+
+
+
=
1
10
1
1
1
1.0
)( ss
s
sTF (b)
+
+
+
+
++
=
1
6
1
6
1
2
1
5.0
12
1.0
10
1
)(
2
2
ssss
s
s
sTF
Bode diagram, problem 26.1(a)
Freq uency (rad /se c)
Phase (deg) Magnitude (dB)
-5
0
5
10
15
20
10
-2
10
0
10
2
-90
-45
0
45
90
Bode diagram, problem 26.1(b)
Frequency (rad/sec)
Phase (deg) Magnitude (dB)
-40
-30
-20
-10
0
10
20
10
-2
10
0
10
2
-180
-135
-90
-45
0
45
90
135
180