The GATE Grind

GATE Control Systems: Lag, Lead and Lead-Lag compensators; P, PI and PID controllers – Previous Year Questions

3 GATE previous year questions on Lag, Lead and Lead-Lag compensators; P, PI and PID controllers (Control Systems, Electrical Engineering) with answers and explanations, from every paper.

  1. GATE 2019 EE Q40 (2 marks, Multiple choice) – The transfer function of a phase lead compensator is given by D(s)=3(s+13T)(s+1T) The frequency (in rad/sec), at which D(j) is maximum, is
  2. GATE 2023 EE Q38 (2 marks, Multiple choice) – Consider a lead compensator of the form K(s)=1+ sa1+ s a,>1,\ a>0 The frequency at which this compensator produces maximum phase lead is 4 rad/s. At…
  3. GATE 2025 EE Q65 (2 marks, Numerical answer) – A controller D(s) of the form (1+K Ds) is to be designed for the plant G(s)=10002s(s+10)2 as shown in the figure. The value of K D that yields a phase…