Q1. Sketch the
bode plot and find the stability of the system for the following functions
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- G(s) = 50/(s+1)(s+2)
- G(s) = 50/[s^2(s+1)(s+2)]
Q2. Define the following
terms : (i) Bode Plot, (ii) Gain Marging ,(iii) Phase margin
, (iv) Gain cross over frequency and (v) Phase
cross over frequency
Q 3. What is the
requirement of gain margin and phase margin for a system to be
stable/unstable / marginally
stable?
Q4. What
information you get from Bode's plot.
Q5. State advantages
of Bode Plot
Q6 . Determine the angle
and magnitude of G(s)H(s) = s(s+1)/[(s+1)(s+2) at s =j5.
Q7. Determine the open
loop transfer function from the bode plot shown below
Q8: Determine the
value of K for the open loop transfer function G(s)H(s)= K/[s(1+0.1s)(1+s)]
so that (a) the gain margin is 15 db
and (b) phase margin is 60 degree.
Q9. Draw the Bode
plot for the transfer function G(s)H(s) =
48(s+10)/[s(s+20)(s^2+2.4s+16)
Q10 Sketch
the Bode plot for the transfer function G(s)H(s)=
1000/[s(1+0.1s)(1+0.001s)] and
determine (a) Gain cross over frequency
(b)
Phase Cross over frequency
(c)
G.M and P.M.
(d)
stability of the given system
Root Locus:
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1.
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Explain
the term centroid and asymptotes?
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2.
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What
is break away point?
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3.
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Calculate
the angle of asymptotes and centroid
for the system having G(s)=
K(s+2)/[s(s+1)(s+4)
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4.
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Find
the centroid and breakaway point for
the system having G(s) = K/[s(s+2)(s^2+6s+25)]
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5.
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For G(s)H(s) = K/[s(s+1)(s+3)], determine
the coordinates of valid break-away/break in points(s)
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6.
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Sketch
the root locus for (i) G(s)H(s)=
K/s(s+3)(s+5) and (ii) G(s)H(s) = K/[s(s+6)(s^2+4s+13)] (Manke)
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7.
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Explain the effect of addition of poles and
zeros to a second order control
system. (root Locus)
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8.
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For
G(s) H(s)= K/s(s+4) Draw loot locus and determine the value of K if the damping ratio is 0.707 .
(Manke)
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9.
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How
will you obtain the angle of departure and angle of arrival of root locii?
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10.
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State
the rule for obtaining the breakaway point
in the root locii.
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Nyquist
Plot
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1.
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What
do you mean by Nyquist Criterion?
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2.
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For
G(s)H(s)= K/[s(s+1)(s+2)], draw the nyquist plot and hence calculate the
range of values of K for stability.
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3.
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Using
Nyquist criterion investigate the
stability of a unity feedback control
system for G(sH(s) = 20/[s(s+2)(s+3)]
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4.
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Draw
the Nyquist plot for the system G(s)H(s)=1/[s(s-2)] and investigate the stability
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5.
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Using Nyquist
criterion investigate the stability of a closed loop control
system whose
open loop transfer function is K/[s^3(ST+1)]
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M
and N Circles
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1.
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What are M and N circles?
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2.
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Write
short notes on M and N circles.
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Note: Students
can download their study materials
from the blog:
bhaskaracharyablogspot.com. Three links are given to you. You can download theses reference books online also.
If any doubt regarding these practice
questions you can contact me any
time.
Stay
home stay safe and Take care to you and your family
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