Figure 6
From: Performance and robustness analysis of V-Tiger PID controller for automatic voltage regulator

Closed-loop plant with ref(jω) and δ(jω) = δu(jω) = 0.
From: Performance and robustness analysis of V-Tiger PID controller for automatic voltage regulator

Closed-loop plant with ref(jω) and δ(jω) = δu(jω) = 0.