Analysis of Error Sources of a Torque and Rotation Angle Calibration Unit Based on Statics

Abstract

The structure and working principle of the torque calibration unit, the index angle calibration unit, and the loading mechanism are introduced. Using finite element analysis tools for static analysis, the error sources of the calibration process are obtained and the influence on the calibration results is analyzed. Among them, the influence of connecting rod deformation, torque transmission characteristics, and flexible deformation on the calibration accuracy is small and can be ignored. Bearing friction, coaxiality, and micro-deformation of the test bench are inherent errors of the system. For its own inherent error attribute, it will not affect the relationship between the sensor to be calibrated and the standard sensor on the output shaft of the index test bench, that is, it will not affect the calibration process of the sensor to be calibrated later.