How to tune EV Delay

What is the suggested method of tuning the EKF2_EV_DELAY parameter? I’ve been just moving it around and empirically seeing if my drone flies better or worse. Does anyone have a better suggestion, or does PX4 1.14 support a more data driven approach to calculating that delay?

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I’d try to get some log data where you do some transitions from still to movement and then you compare the IMU measurements (e.g. gyro) which can be considered at time 0 and the vision signals coming in, presumably with some delay.

Oh very nice I like the data driven approach, thanks @JulianOes !