This application relates to the field of navigation, specifically to a method for estimating the
zero bias of an inertial navigation
gyroscope for a track inspection trolley. The method includes: for multiple
total station locations, acquiring the
arrival time of the track inspection trolley at each
total station location, the
station position coordinates of each
total station location, and the
inertial navigation system's calculated position for each total
station location; for any discontinuity between two total stations, calculating the total
station location vector corresponding to the discontinuity based on the coordinates of the two stations, calculating the
inertial navigation system's calculated position vector corresponding to the discontinuity based on the two
inertial navigation system's calculated positions, and calculating the installation
deflection angle corresponding to the discontinuity based on the station location vector and the inertial
navigation system's calculated vector; and estimating the
gyroscope zero bias based on the rate of change of the installation
deflection angle with the
arrival time. The inertial navigation
gyroscope zero bias estimation method for a track inspection trolley provided in this application achieves the technical effect of improving the accuracy of gyroscope zero bias
estimation results under special environments and enhancing the environmental applicability of the gyroscope zero bias
estimation method.