$u = -K \hat{x}$, where an observer computes $\hat{x}$ from $y$

Example · Undergraduate

Terms

Term	This example	Why
output feedback	✓	$u = -K \hat{x}$ is output feedback because the observer’s estimate $\hat{x}$ is computed from the output $y$, not from the state.
state feedback	✗	By the separation principle, a stabilizing state feedback combined with a converging observer stabilizes the system.

Distinctions using this example

• State feedback vs. output feedback

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