Originally Posted by
PPRuNe Towers
W/V derived from a mathematical process called
Kalman Filtering - it must be a complex process as it introduces a 7 or 8 second lag in the EFIS/FMC displays. More meat in the link above.
Same method and
hysteresis with ATC surface wind processing and reporting. If you really need to know instant W/V ask for 'spot wind.'
Rob
Yeah, we use an EKF (Extended Kalman Filter) implemented in software, in the drones we make... it's definitely processing heavy.
We usually use either of 2 controllers... One's the APM, other's the Pixhawk.... and the APM just can't do EKF cause it's 8-bit.. while the Pixhawk can... cause it's 32-bit.
The Pixhawk uses EKF to smoothen out the Gyro and GPS Readings... and that gives it a much more smooth and coordinated flight. It's literally like the difference between how a (non-FBW) 737 feels vs a (FBW) A320 in terms of smoothness.