Bias correction apparatus of gyro.

摘要

A bias correction apparatus comprising a gyro (43), bias calculation means for reading output data of the gyro (43) after every fixed period (To) after the apparatus is turned on and for calculating a bias value of the gyro (43) on the basis of the read output data, storage means for storing the bias value calculated by the bias calculation means, and bias correction means for correcting angular velocity data ( delta theta ) of a vehicle obtained from the gyro output data with the bias value stored in the storage means. When calculating a first bias value after the apparatus is turned on, the bias calculation means calculates the bias value by reading the gyro output data every period (T) shorter than the certain fixed period (To) (=>T<To). <IMAGE>