engineering recuitment GATE ECE 2023-24 Test Series Control Systems Frequency Response Analysis Nyquist Plot
The Nyquist plot for the system \(GH\left( s \right) = \frac{{k\left( {1 + {T_2}s} \right)}}{{{s^2}\left( {1 + s{T_1}} \right)}}\)
For positive values of T1 and T2 Nyquist plot is shown for different cases of T1 and T2
Case a:
Case b:
T1 = T2
Case c:
T1 > T2
The system is absolutely stable for:
1
Case ‘a’ only
2
Case ‘a’ and case ‘b’ only
3
Case ‘c’ only
4
Case ‘b’ and case ‘c’ only