Chief Delphi - Gyro not accurate

Quote:

Originally Posted by Tom Saxton

I don't know if this is an issue with the gyro from the KOP, but we use an ADXSR150 in a Robo-Magellan robot and found that the gyro gives different values when rotating clockwise vs. counterclockwise. So, when doing integration/averaging we use different denominators for values above and below the centerpoint.

Until we did this, it was impossible to rotate one way and back and get a angle value close to the starting value.

whoa! something was not right there. The ADXRS chips should output a + or - signal within their specs, regardless of which way it was turning.

Its possible there was something else wrong with the way the chip was implemented in your system: the analog circuit? filtering? the ADC converter?

The ADXRS chips have been used in systems where the measured total (compass) error is on the order of degrees per hour. They are normally excellent and very accurate.