# State Space, Part 4: What Is LQR control?

MATLAB
Published at : 03 Feb 2021
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Check out the other videos in the series:
Part 1 - The state space equations: https://youtu.be/hpeKrMG-WP0
Part 2 - Pole placement: https://youtu.be/FXSpHy8LvmY
Part 3 - Observability and Controllability: https://youtu.be/BYvTEfNAi38

LQR is a type of optimal control that is based on state space representation. In this video, we introduce this topic at a very high level so that you walk away with a general understanding of the control problem and can build on this understanding when you are studying the math behind it. This video will cover what it means to be optimal and how to think about the LQR problem. At the end I’ll show you some examples in MATLAB that I think will help you gain a little intuition about LQR.

Check out these other resources!
Integral action: http://bit.ly/2t4hwIr
LQR by Christopher Lum: https://youtu.be/wEevt2a4SKI
LQR by Steven Brunton: https://youtu.be/1_UobILf3cc
Solving LQR problem: http://bit.ly/2t5gc8k

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