Digital Calibration and Compensation Method for Angle Measure System Based on Resolver-RDC

A kind of high precise angular measurement system based on resolver-RDC for measuring revolving and direct-driving servo motor was used.The angular measurement system scheme was introduced.The feature of resolver and RDC and the choice of their correlative parameter were proposed also.To enhance measure precision and reliability,a kind of digital calibration was presented.After analyzing the curve of calibration,the leap error of RDC and the orthogonal error of resolver were educed the error compensation method by software was introduced.Experiments verifyed the angular measurement system's precision was achieved 3 minute of arc.