1
GATE ECE 2002
Subjective
+5
-0
The Nyquist plot of an all-pole second order open-loop system is shown in Figure.
Obtain the transfer function of the system.
2
GATE ECE 1999
Subjective
+5
-0
Consider a feedback system with the open loop transfer function given by
$$G(s)H(s) = {K \over {s\left( {2s + 1} \right)}}.$$
Examine the stability of the closed-loop system using Nyquist stability.
3
GATE ECE 1999
Subjective
+5
-0
The asymptotic bode plot of the minimum phase open-loop transfer function G(s)H(s) is as shown in the figure. Obtain the transfer function G(s)H(s)
4
GATE ECE 1998
Subjective
+5
-0
The loop transfer function of a single loop control system is given by
$$G(s)H(s) = {{100} \over {s\left( {1 + 0.01s} \right)}}{e^{ - ST}}$$
Using Nyquist criterion, find the condition for the closed loop system to be stable.
Questions Asked from Frequency Response Analysis (Marks 5)
Number in Brackets after Paper Indicates No. of Questions
GATE ECE Subjects
Signals and Systems
Representation of Continuous Time Signal Fourier Series Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics