Which of the following mathematical norms is primarily used in $\mathcal{H}_\infty$ control to quantify the worst-case gain of a system over all frequencies?
Question 2
In robust control, what is the primary distinction between 'robust stability' and 'robust performance'?
Question 3
Consider a system with a nominal plant $P(s)$ and an additive uncertainty $\Delta(s)$, such that the actual plant is $P_{actual}(s) = P(s) + \Delta(s)$. If the controller is $K(s)$, which of the following expressions represents the sensitivity function $S(s)$?
Question 4
Which of the following best describes the role of the structured singular value ($\mu$) in robust control analysis?
Question 5
In $\mathcal{H}_\infty$ control, what is the significance of minimizing the $\mathcal{H}_\infty$ norm of a closed-loop transfer function?
