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    Concorde - Constant Oscillation in INS Mode

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    • E
      ewky last edited by

      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:
      alt text

      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.
      alt text
      alt text

      Please look into this, much appreciated!

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      • E
        ewky @ewky last edited by

        @DC1973 bumping for attention, thanks!

        DC1973 1 Reply Last reply Reply Quote 0
        • DC1973
          DC1973 @ewky last edited by

          @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

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