#2 Home Made Helicopter Gyro on Test Rig (04-05-2009)

[Positivedelta]

All gyros will drift eventually as the sensors are noisy. Ultimately this noise gets accumulated by the "bearing tracking" calculations and ends up as drift.

The best you can do is keep your control loop gains as low as possible and apply appropriate filtering the sensor in order to reduce the bandwidth/noise. If done correctly the drift is minimal and not noticeable across the flight time of a typical model helicopter.

[dammachines]

Looks good! Just wondering, how do you cancel gyro drift? Or will it drift slowly if left at one heading for more than a few seconds?

[Positivedelta]

A helicopter tail rotor must be completely controlled and should only allow the aircraft rotate in a precise fashion when commanded to so. In the video you cant actually see how or when the system is being controlled (via a radio control transmitter) so I can see how this may all appear to be a bit odd!

The test rig allows the software for the tail rotor stabilisation gyro to be debugged and tuned on the bench. Actual flight testing can occur once the basic are all working.

[obagi45]

? what