Can SpaceX land a rocket with 1/2 cm accuracy?

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by meindnoch on Monday October 21, 2024 @02:12PM (#41906766)

The robot knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is (whichever is greater), it obtains a difference, or deviation.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by mucle6 on Monday October 21, 2024 @02:18PM (#41906811)

Reference: https://www.youtube.com/watch?v=bZe5J8SVCYQ

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by killjoywashere on Monday October 21, 2024 @03:24PM (#41907487)

This voice sounds like something that Mark Farina should be dubbing into his next album. But it's the first time I've heard this bit. Where did it come from? Is this a classic in engineering circles of some shit Rockwell actually sold to the military?

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by rcxdude on Monday October 21, 2024 @05:21PM (#41908635)

It's from an old air force training video. Best guess I'be heard it that it's an unsuccessful attempt to explain Kalman filters (or something similar) in layman's terms.

It's definitely floated around for a while, but it grew in popularity in the past few years.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by yetihehe on Tuesday October 22, 2024 @06:02AM (#41912792)

It was already dubbed into a song. https://www.youtube.com/watch?v=_LjN3UclYzU

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by lacrosse_tannin on Monday October 21, 2024 @03:46PM (#41907778)

this sounds like it's read directly out of the inscrutable text book for the one control systems class i had to take.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by hedora on Monday October 21, 2024 @03:19PM (#41907444)

I think this was called "error.wav" when I first saw it sneaking around a campus network.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by ls612 on Monday October 21, 2024 @10:10PM (#41910500)

I thought it was a Cave Johnson reference before seeing this.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by dang on Wednesday October 23, 2024 @11:28AM (#41926035)

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by scottshambaugh on Monday October 21, 2024 @03:15PM (#41907398)

> whichever is greater

This always stuck out in an otherwise excellent bit, because you should definitely _not_ be taking the absolute value of your control error.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by m4rtink on Monday October 21, 2024 @02:41PM (#41907061)

By this point I automatically even read it by that voice. :P

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by exe34 on Monday October 21, 2024 @02:33PM (#41906997)

this only works if the retroencabulator is properly calibrated.

[ Parent | on HN ]

Re:Can SpaceX land a rocket with 1/2 cm accuracy? by rascul on Monday October 21, 2024 @09:38PM (#41910339)

How does the robot know where it isn't?

[ Parent | on HN ]