Research Article

Frequency-Domain Robust Performance Condition for Controller Uncertainty in SISO LTI Systems: A Geometric Approach

Figure 4

(a) The critical range for maximum possible magnitude verification, (b) limit calculation regarding , (c) angle conversion, and (d) geometric transformation after normalization.
746762.fig.004a
(a)
746762.fig.004b
(b)
746762.fig.004c
(c)
746762.fig.004d
(d)