Mileometer data modeling method for combined navigation semi-physical simulation

The invention discloses a mileometer data modeling method for combined navigation semi-physical simulation. The method comprises the six steps of 1, installing an inertial navigation/mileometer combined system on a carrier and starting the system by power, 2, setting initial parameters in a navigation computer, 3, keeping a carrier static state and carrying out static initial alignment on the inertial navigation unit for 5min, 4, after alignment, moving the carrier, carrying out inertial navigation calculation in movement, and acquiring and storing inertial navigation output rate values and a mileometer output speed in 50s after motion, 5, calculating a carrier rate reference value by the inertial navigation rate value, and calculating the difference of the mileometer output speed and the carrier rate reference value to obtain a noise value of the mileometer output speed, and 6, setting a simulation locus, calculating a mileometer speed standard value and a standard error value by the carrier movement rate, carrying data fusion on the speed standard value, standard error value and the noise value of the mileometer output speed obtained by the step 5 so that the mileometer rate for the combined navigation semi-physical simulation is obtained.