Gyro error | Article about gyro error by The Free Dictionary
gyro error[′jī·rō ‚er·ər]
The error in the reading of the gyro compass, expressed in degrees east or west to indicate the direction in which the axis of the compass is offset from the north.
References in periodicals archive
The gyro error
angular rate [delta]w is assumed as the difference between the estimated and actual angular rate: [delta]w = w - [??].
Accelerometer Errors Bias Instability ([??]/hr) Bias Instability (m/[s.sup.2]) Angle Random Walk ([??]/[??]hr) Velocity Random Walk (m/s/[??]hr) Scale Factor & Non-Linearity ([??]/hr) Scale Factor & Non-Linearity (m/[s.sup.2]) Axis Orthogonality ([??]) Axis Orthogonality ([??]) These errors always need to be considered, however, additional errors can also be important such as the sensitivity of the gyro to linear acceleration, and the accelerometer bias sensitivity to vibration.
It can be seen that the heading accuracy is largely affected by the east gyro errors
. We have known that the Earth rate is about 15[degrees]/h; for the low cost gyros, it cannot align itself because the noise levels are near or higher than the Earth rate.