Error model of strapdown magnetic heading measurement system without considering magnetic deviation is built up

the dynamic error characteristics of magnetic heading under different flight condition for UAV is analyzed

combined with the attitude measurement characteristics of the frame type vertical gyro which is introduced into the error model. Error model is simulated

at the same time the simulation results and the experimental results are analyzed. The results show that the dynamic error character of the strapdown magnetic heading measurement system accords with the measurement error characteristics

and can provide theoretical basis for engineering application.