Position sensor signal relay type error correction method and correction device

The invention relates to a position sensor signal relay type error correction method and correction device, and the method comprises the steps: building an error correction mathematical model, and inserting a relay station into a signal transmission channel of a position sensor to be subjected to error correction; after the error correction function is activated, the following work is periodically carried out on the selected position sensor needing error correction: (1) the current moment is set as t1, and the relay station reads the measured value X (t1) of each position sensor; (2) according to the mathematical model, the relay station calculates to obtain a reading value Y (t1) of each position sensor after error correction at the current moment; (3) according to the original working mode of the position sensor, the relay station transmits a reading value subjected to error correction to the controller; the correction device comprises a sensor signal input subsystem, an error correction algorithm high-spee