PX4-Autopilot VS manifold_cdkf

They are widely used in narrow circles :)

Two of (arguably the best) open source RC aircraft flight controllers (ArduPilot and PX4) are using extended Kalman filters in their state estimators (essentially sensor fusion that provides attitude/position estimate):

https://github.com/ArduPilot/ardupilot/tree/master/libraries...

https://github.com/PX4/PX4-Autopilot/blob/main/src/modules/e...

I'm not that familiar with cleanflight/betaflight/inav scene to know what the FPV racer flight controllers use.

Actually, even the General Aviation pilots who actually manually manage their own load-shedding during a mission would quite like automated power distribution and management systems... and if you felt like taking on that sort of work as a hobby project to cut your teeth, I bet the guys at the (open-source) PX4 project would bite your hand off...

As a flight pilot engineer you have to find a sweet spot and balance logging too much and too little. Writing logs to an SD card has huge costs that come with it, that's why you don't want to log too much. Logging too little and you can't debug issues later on properly.

PX4 also has lots of "topics" logged at around 1/10, e.g. hover thrust estimate every 100ms:

https://github.com/PX4/PX4-Autopilot/blob/main/src/modules/l...

Okay, but nowadays most people talk about “Pixhawk” as an open-standard hardware platform and PX4 as the software. The source code is at https://github.com/PX4/PX4-Autopilot and they call themselves “PX4 Autopilot Software”.

As an example, PX4 is a popular open source drone autopilot software: https://github.com/PX4/PX4-Autopilot

I am working as a Remote Embedded Software developer for quite a while now and there is no obstacle in Remote work. If I am missing anything, parts are arriving in under the week. That said, I never had a better work-life balance in the last 10 years. Anyone who said Embedded is not possible to do remotely just check any open source flight controller project (in my case PX4).

That paper [1] is from 2010. What did "industry" use before that for pysically moving objects?

If this is the current state of the art, are there generally-available/open-source libraries existing that implement this and practitioners use for this?

The only one I could find is https://github.com/kartikmohta/manifold_cdkf, which currently has 8 Github stars.

I also found an approach mentioned in [2] that is to just treat a single rotation angle as linear, and then wrap it around at 180 degrees in between state updates with additional conditional logic. Is this what people did in practice before? I cannot find substantial info on this.

How did people use KF on physical objects before 2010?

[2]: https://old.reddit.com/r/ControlTheory/comments/d2yrjq/kalma...