Roll controller: using wind roll angle?

Hi everyone,

the roll servo output is calculated using the roll angle (between geodetic and body-fixed coordinate system), isn’t it?

To avoid unadequate PID responses, we might have to use the wind roll angle (between aerodynamic and geodetic coordinates, unaffected by mathematically increasing roll angles towards high pitch angles) to generate servo outputs.

Using the path roll angle (between the path-axis coordinate system and the body-fixed coordinate system) might help to understand the need, but would not be helpful in relatively high vertical wind speeds (in combination with relatively light and slow RC airplanes the commmunity uses mostly).

What do you think?