diff --git a/4 Qualifying Exam/3 Notes/Feedback Control Theory.md b/4 Qualifying Exam/3 Notes/Feedback Control Theory.md
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+++ b/4 Qualifying Exam/3 Notes/Feedback Control Theory.md	
@@ -92,11 +92,8 @@ W_2 is basically a transfer function that will always be greater in magnitude th
 >> [!important] Robust Stability
 >> A system is robustly stable if it is internally stable for every plant in the set $\mathcal{P}$:
 >> $$|| \Delta W_2 T ||_\infty < 1$$
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+>> ![[Pasted image 20241015172652.png]]
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+>>[!important] Robust Performance
+>>$$ |||W_1 S | + |W_2 T| ||_\infty < 1 $$
+>>![[Pasted image 20241015172708.png]]
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