Zero offset, also known as zero drift or zero offset or zero offset stability, can also be referred to as zero drift or drift rate, which is called drift or bias drift in English. Zero offset is understood to mean the fluctuation or fluctuation of the gyroscope's output signal around its mean, which is customarily expressed in terms of standard deviation (σ) or root mean square (RMS) and is generally converted to the equivalent input angular rate (°/h). When the angular velocity input is zero, the output of the gyroscope is a curve in which the composite white noise signal changes slowly. The peak-to-peak value of the curve is the zero offset (drift), as shown in Figure 2-6. In the entire performance indicator set, zero bias is the most important indicator to evaluate the performance of the gyroscope.
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