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Rudder deflection and Roll cross-coupling control in ardupilot?

Posted by Todd Berk on May 23, 2009 at 11:34am
How is the cross-coupling between Rudder and Roll being controlled in the ArduPilot since there are no ailerons? I'm doing some autopilot research for my Parkzone Radian, similar to the EasyStar in that there are no ailerons. Basically, a simple PID loop for heading by actuating the rudder won't work since you will impose roll and sideslip. What is the ArduPilots method for heading and roll control?Thanks!-Todd
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Comments

  • Moderator
    Gary Mortimer May 30, 2009 at 9:22am
    There is an RC model for flightgear if you look, with OSD!!
  • Todd Berk May 24, 2009 at 11:01am
    Ahh, Good point on the dihedral wings. I'm trying to simulate the controls on Flightgear and UAVPlayground and was having issues with the cross-coupling, but I was using the Cessna, I should probably try a plane w/ dihedral wings. Hopefully FlightGear will simulate the stability effects of dihedral wings.
  • 3D Robotics
    Chris Anderson May 23, 2009 at 4:43pm
    I think you're overthinking it. For aircraft with dehideral, like the EZ, sideslip isn't a big problem. It's pretty easy to chain your stabilization and navigation PIDs loops, as we do with the ArduPilot code. Just watch it in flight and you'll see.
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