Abstract
Bias is one of the main parameters in laser gyroscopes. A traditional method to calibrate the bias may need to adjust the input axis of the gyro to remove the influence of the earth rotation rate from the measured bias. It will not be convenient for a single-axis turning table, thus this thesis brings forward a new method of measuring the angle between the gyro's input axis and the horizontal plane, without adjusting the input axis. Using this method, the bias of one laser gyro is measured. The result turns out to be a repeatability of 0.0026°/h (1σ), which accords to the performance of the gyro, and this has validated this method.
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