Concorde - Constant Oscillation in INS Mode

[ewky]

Hi,

Summary: When using INS mode for lateral navigation, the Concorde constantly oscillates around the enroute leg. This phenomenon is even more exaggerated at high speeds.

How to reproduce:

1. Boot up a flight
2. Accelerate to supersonic
3. This behavior occurs after overshooting turns

Here's an example of the "oscillation" that occurred during my last flight:

Thoughts: An uneducated guess from what I vaguely remember in my college control theory class, it appears the parameter to the LNAV PID controller is badly tuned.

Please look into this, much appreciated!

[ewky]

@DC1973 bumping for attention, thanks!

[DC1973]

@ewky Just seen this. Are you using Airways? Concorde is much too fast for any other form of INS navigation. I have not seen oscillations unless the waypoints are just too close together, in which case Concorde cannot track them accurately at Mach 2