Since you are talking about a driver being in this loop to start with, why not allow the driver to decide if it is time for a recalibration?
That is, create the feature, but make a way to allow the driver a way of calibrating it if it drifts to much.
The calibration might be as simple as pushing a button at some point when the robot is pointing in the right direction.
All that would do is tell the controller on the robot to zero out a variable which is keeping the currrent direction of the robot. (Assuming zeroing out the variable "means" pointing in the direction you want)
Anyways.....so long as this isn't required very much in the round, it might be a cheap way to get it done. (I don;t mean just cheap in terms of money, but development time too)
Just a thought...BTW: I have never tried to integrate the output of the gyro, so I don;t know what sort of error build-up to expect.. Tell us what you find.....please. (even if you just experiment with it and never actually use it)
-Quentin
Quote:
Originally posted by D.Viddy
I would like to create a 4 wheel drive 4 wheel steering drive system that uses the gyroscope for orientation information. I want to allow the driver to push forward and have the robot go forward no matter what direction it's facing. But, I have heard that this technique works fine, but the accuracy decays over time. Is there a way to periodically check with another source other than the gyro that everything is accurate? Something like an electronic compass maybe? Also, how is the gyro accuracy going to be effected in the case that the robot is bumped into a new position? Or what about using a second gryo to compare information? Any information would be appreciated. 
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