MATERIALS SCI.+ENGR.:INTRO.-NEXTGEN
10th Edition
ISBN: 9781119503941
Author: Callister
Publisher: WILEY
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Chapter 9, Problem 70QAP
To determine
The Brinell hardness of the given alloy.
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Students have asked these similar questions
1. Consider the systems whose transfer functions are given as below. Determine (i)
BIBO stability, (ii) strict internal stability, and (iii) marginally internal stability for each
of the systems. You should be able to answer these just simply finding the poles and
checking sign of real part of the poles.
a) H(s) =
(s-3)
(s+1) (s+3)²
2 (s-5)
b) H(s)
=
c) H(s) =
(s-5)(s+1)
$2
((s+3)²+4)2
d) H(s) =
e) H(s) =
S
(s-3)²+4
(S-4)
(s²-4s)(s+1)²
f) H(s) =
S+1
(s²+9)2
should note: it is no coincidence that the inductor current and the
resistor voltage have the same exponential dependence!
PRACTICE
8.5 Determine the inductor voltage v in the circuit of Fig. 8.16 for
t > 0.
Ans: -25e-2t V.
6Ω
ww
4Ω
w
+
t = 0
ν
10 V
ele
ic
5 H
FIGURE 8.16 Circuit for Practice Problem 8.5.
3. Determine the range of K for stability of the following feedback control system
U(s) +
K
G(s)
→Y(s)
where
1
G(s)
s(s + 1)(s + 2)
To solve this problem, you should first find the closed-loop transfer function and
then apply Routh Hurwitz criterion.
Chapter 9 Solutions
MATERIALS SCI.+ENGR.:INTRO.-NEXTGEN
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