Abstract
Ideally, when the input angular velocity is zero, the gyroscope output will also be zero. However, considering unavoidable manufacturing errors, material defects, structural stresses and the non-ideal nature of drive circuit components, the gyroscope output is never actually equal to zero, even with no angular velocity input. The output at this moment is known as the bias of the gyroscope. Constant bias can be eliminated by software compensation, to avoid any impact on the navigation system. However, the intrinsic instability of bias results in an incorrect angular velocity being output, which seriously affects the accuracy of the navigation and attitude control system.
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