Questions & Answers of Bode Plots

Weightage of Bode Plots

Total 7 Questions have been asked from Bode Plots topic of Control Systems subject in previous GATE papers. Average marks 1.43.

Consider the unity feedback control system shown. The value of K that results in a phase margin of the system to be 30° is ___________. (Give the answer up to two decimal places)

 

The phase cross-over frequency of the transfer function GS=100S+13 in rad/s is

Consider the following asymptotic Bode magnitude plot (ω is in rad/s).

Which one of the following transfer functions is best represented by the above Bode magnitude plot?

A Bode magnitude plot for the transfer function G(s) of a plant is shown in the figure. Which one of the following transfer functions best describes the plant?

The Bode magnitude plot of the transfer function GS=K1+0.5s1+ass1+s81+bs1+s36 is shown below: Note that -6 dB/octave = -20 dB/decade. The value of abk is_____________.

For the transfer function

GS=5s+4ss+0.25s2+4s+25

The values of the constant gain term and the highest corner frequency of the Bode plot respectively are

The Bode plot of a transfer function G(s) is shown in the figure below.

The gain (20logG(s)) is 32 dB and –8 dB at 1 rad/s and 10 rad/s respectively. The phase is negative for all ω. Then G(s) is