29 ms·

That's fair! We didn't use any fancy process for loop tuning. I basically played around with it until we were getting decent convergence.

jcims 6y ago
Brian Douglas is the one delivering that MatLab video linked at the bottom of the article. He's got a ton of deep control theory lectures on his own channel, too - https://www.youtube.com/user/ControlLectures/videos https://www.youtube.com/user/ControlLectures/videos
- vladTheInhaler 6y ago
  Steve Brunton also has a wealth of incredibly well-produced content on controls. Here is his control bootcamp series: https://www.youtube.com/playlist?list=PLMrJAkhIeNNR20Mz-VpzgfQs5zrYi085m https://www.youtube.com/playlist?list=PLMrJAkhIeNNR20Mz-Vpzg...
  - activatedgeek 6y ago
    I have seen these videos and highly recommend them especially for people like me who want to get a sense of the traditional control theory literature, have seen similar concepts elsewhere and are trying to map the motivations and notations.
  - jcims 6y ago
    Wow that looks like a great series, thanks for the heads up. I'm just starting to dip my toes into basic PID control and am astounded by how deep (and predictive) the math can get in this domain. Edit: Also, I learned a lesson about closed-loop systems with the launch (well, EDL) of the Curiosity rover on MARS. It's mentioned in this article [1] but the trigger to start lowering the rover on the crane wasn't some process monitoring distance from the ground...it actually had no direct notion of that. It just watched the throttle setting on the retro-rockets and started unwinding the winch when the throttles reached a reduced steady state setting...something expected once the descent stage had reached its hover altitude. [1] (search for throttle) - https://www.planetary.org/blogs/emily-lakdawalla/2012/07060700-how-curiosity-land-part-3.html https://www.planetary.org/blogs/emily-lakdawalla/2012/070607...
  - thr0w__4w4y 6y ago
    That looks like a good series to watch, thank you. Totally unrelated, but the first time I saw that technique with writing on the glass and then flipping the video L-R was about 4 years ago when F5 did a good video introduction on elliptic curve cryptography [0] They (F5) even wrote up the technical details of their Lightboard [1] [0] https://youtu.be/dCvB-mhkT0w https://youtu.be/dCvB-mhkT0w [1] https://devcentral.f5.com/s/articles/lightboard-lessons-behind-the-scenes https://devcentral.f5.com/s/articles/lightboard-lessons-behi...

jcims 6y ago

Brian Douglas is the one delivering that MatLab video linked at the bottom of the article. He's got a ton of deep control theory lectures on his own channel, too - https://www.youtube.com/user/ControlLectures/videos https://www.youtube.com/user/ControlLectures/videos

vladTheInhaler 6y ago
Steve Brunton also has a wealth of incredibly well-produced content on controls. Here is his control bootcamp series: https://www.youtube.com/playlist?list=PLMrJAkhIeNNR20Mz-VpzgfQs5zrYi085m https://www.youtube.com/playlist?list=PLMrJAkhIeNNR20Mz-Vpzg...
- activatedgeek 6y ago
  I have seen these videos and highly recommend them especially for people like me who want to get a sense of the traditional control theory literature, have seen similar concepts elsewhere and are trying to map the motivations and notations.
- jcims 6y ago
  Wow that looks like a great series, thanks for the heads up. I'm just starting to dip my toes into basic PID control and am astounded by how deep (and predictive) the math can get in this domain. Edit: Also, I learned a lesson about closed-loop systems with the launch (well, EDL) of the Curiosity rover on MARS. It's mentioned in this article [1] but the trigger to start lowering the rover on the crane wasn't some process monitoring distance from the ground...it actually had no direct notion of that. It just watched the throttle setting on the retro-rockets and started unwinding the winch when the throttles reached a reduced steady state setting...something expected once the descent stage had reached its hover altitude. [1] (search for throttle) - https://www.planetary.org/blogs/emily-lakdawalla/2012/07060700-how-curiosity-land-part-3.html https://www.planetary.org/blogs/emily-lakdawalla/2012/070607...
- thr0w__4w4y 6y ago
  That looks like a good series to watch, thank you. Totally unrelated, but the first time I saw that technique with writing on the glass and then flipping the video L-R was about 4 years ago when F5 did a good video introduction on elliptic curve cryptography [0] They (F5) even wrote up the technical details of their Lightboard [1] [0] https://youtu.be/dCvB-mhkT0w https://youtu.be/dCvB-mhkT0w [1] https://devcentral.f5.com/s/articles/lightboard-lessons-behind-the-scenes https://devcentral.f5.com/s/articles/lightboard-lessons-behi...