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The axial error is the main factor that causes the angular angle sensor error to eliminate, in order to improve the angle sensor accuracy, based on the round grating, from the geometric angle and the moir stripe angle, the axial error and the column grating and the end grating Establishing a mathematical model, and simulates the axial eccentricity and axial tilt errors. The simulation results show that the angular error error is proportional to the axial eccentricity; the influence of the axial tilt on the column grating is greater than the end grating. Axial error analysis provides a theoretical basis for determination of angular sensor shaft error inhibition.
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