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Looking for specific variables

Connecting two computers, using generic protocol, connecting with Matlab?

Looking for specific variables

Postby NelsonB » Mon Jan 08, 2018 4:24 pm

Hi there,
I am interfacing FlightGear with some simulation models, and I need access to specific data for some calculations, unfortunately I am not an aircraft specialist and I am not sure if some values I am looking for are just not available under the property tree or if they have a name different from the one I am looking for.
So here is the variable list, with a short description:

    Wander Azimuth Angle: Current angle which the navigation frame is rotated around the z axis with respect to the geodetic frame
    Heading RelativeTo Grid North: Current yaw with respect to grid north
    Heading Angle (stability axes) : Current direction the aircraft’s nose is pointing measured in the stability axes reference frame
    True Track Angle: Direction of aircraft movement over the Earth’s surface
    Landing Gear Braking force: Landing Gear Braking force
    Landing Gear wheel angle: Steering wheel angle
    Coefficient of Lift: Coefficient relating to the aircraft's lift
    Lift: Current lift of aircraft (in lbs)
    Coefficient of Drag and Drag

I already had a look to several resources, including:
https://github.com/FlightGear/flightgea ... properties
http://wiki.flightgear.org/Property_tree
http://wiki.flightgear.org/Aircraft_pro ... _reference

And still have no clue on these variables.

So if anyone can direct me to the right entry in the property tree...

Nelson.
Last edited by NelsonB on Tue Jan 09, 2018 3:29 pm, edited 1 time in total.
NelsonB
 
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Re: Looking for specific variables

Postby Thorsten » Mon Jan 08, 2018 6:02 pm

Especially for YaSim, I suspect several of the aero coefficients may not be exposed to the property tree.

It seems relatively straightforward to simply compute all you need using property rules - you may have to spend a day to learn the syntax and general implementation, but once you're done you can just go ahead and compute whatever you want from the content of /position /orientation /velocity and /acceleration
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