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What is Zero Drift or Zero Bias Stability?

It is one of the important indexes to measure the precision of gyroscope.Denotes that when the input angular rate is zero, it measures the dispersion degree of the output of the gyroscope around its mean value (zero deviation).The equivalent angular rate of the corresponding standard deviation of the output within a specified period of time, also known as zero drift.The units are degrees per hour, degrees per second.

The method to calculate the gyro zero-bias stability is to collect a section of data, remove the trend term, and then calculate the mean square error.So obviously, the longer the sampling time, the longer the smooth data length, the better the zero-biased stability value.Therefore, sampling time is also one of the parameters to be considered when evaluating accuracy.

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