Q3) The following block diagram depicts a feedback control system of a DC motor where the signal F(s) denotes the setpoint, ē(s) is the error, ū(s) is the controller output and y(s) is the motor position output. The controller and the motor transfer functions are given by K C(s) = K, + sKa and G(s) = s(Ts + 1) F(s) + (s)2 C(s) ū(s) G(s) y(s) Figure Q3 a) Show that the transfer function between the signals F(s) and y(s) is given by K(K, + sKa) Ts² + s(1 + KKq) + KK, Gry (s) = b) Using the result in a) and equating it to the standard second order transfer function Gry (s): s² + 23@ns + w Show that the controller parameters are given by K, 2T7wn – 1 Ka K K c) The feedback system requires the transient response to have a settling time of approximately 1 second and a maximum percent overshoot of 5%. Given the motor transfer function parameters K = 20 and T = 0.1. Calculate the controller parameter values K, and Ka that achieve these requirements.

Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
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Q3) The following block diagram depicts a feedback control system of a DC motor where the
signal F(s) denotes the setpoint, ē(s) is the error, ū(s) is the controller output and y(s)
is the motor position output. The controller and the motor transfer functions are given by
K
C(s) = K, + sKa
and
G(s)=
s(Ts + 1)
F(s) +
ē(s)
C(s)
ū(s)
G(s)
y(s)
Figure Q3
a) Show that the transfer function between the signals F(s) and y(s) is given by
K(K, + sKa)
Ts2 + s(1 + KK4) + KK,
Gry (s) =
b) Using the result in a) and equating it to the standard second order transfer function
Gry (s)
s2 + 2(w,s + w
Show that the controller parameters are given by
Ta
K,
277Wn – 1
Ka
K
K
c) The feedback system requires the transient response to have a settling time of
approximately 1 second and a maximum percent overshoot of 5%. Given the motor
transfer function parameters K = 20 and T = 0.1. Calculate the controller
parameter values K, and Ka that achieve these requirements.
Transcribed Image Text:Q3) The following block diagram depicts a feedback control system of a DC motor where the signal F(s) denotes the setpoint, ē(s) is the error, ū(s) is the controller output and y(s) is the motor position output. The controller and the motor transfer functions are given by K C(s) = K, + sKa and G(s)= s(Ts + 1) F(s) + ē(s) C(s) ū(s) G(s) y(s) Figure Q3 a) Show that the transfer function between the signals F(s) and y(s) is given by K(K, + sKa) Ts2 + s(1 + KK4) + KK, Gry (s) = b) Using the result in a) and equating it to the standard second order transfer function Gry (s) s2 + 2(w,s + w Show that the controller parameters are given by Ta K, 277Wn – 1 Ka K K c) The feedback system requires the transient response to have a settling time of approximately 1 second and a maximum percent overshoot of 5%. Given the motor transfer function parameters K = 20 and T = 0.1. Calculate the controller parameter values K, and Ka that achieve these requirements.
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