NavX MXP Continuous Angle to Calculate Derivative

[Ether]

Originally Posted by Richard100

Not finding this to be very clear either. We're likely discussing different aspects of the problem.

I am discussing the solution to this aspect of the OP's original framing of the problem (see bolded portion):

Originally Posted by lethc

Does anyone have any ideas on how I would get a continuous angle heading from the NavX? I.E. one that doesn't jump from 360 to 0 instantly, because that messes up the derivative calculation

You don't need a continuous angle to do a simple difference calculation (which is what I anticipated the OP was really wanting).

The IEEERemainder gives you that answer:

Originally Posted by Ether

what you want is the shortest angle from the previous reading to the present reading, with the correct sign. The IEEERemainder function¹ does this with one line of code:

shortest_angle = IEEERemainder(present-previous,360);

Originally Posted by lethc

Just tried this out and it works perfectly. Thank you for your help.

[Richard100]

Thanks for taking time to walk through this! The distinction you reference clears up the differing perspectives / solution space.

[Alan Anderson]

Originally Posted by Richard100

Same question as you asked here, only for the LabVIEW language. Equivalent to asking: Can it be done in LabVIEW "... with one line of code".

Any LabVIEW experts know? If not, might this be in the development pipeline?

You can do a "line of code" in LabVIEW by putting it in a Formula Node. It's exactly like writing an expression in C.

[tr6scott]

Labview Subvi implementation of this attached.
Tested with the data set published, and checked results.
Sorry, not a LV guru, so did not take the time create input matrix and results.
(started too, but I knew there was a much simpler way than the way I was doing it.)

Thanks, we struggled with the gyro rollover in the past and this implementation seems to solve all of the issues we have tried to conditionally fix in the past.

Thanks Ether.