Abstract:

In order to solve the problem of the bigger error of the compass-circuit alignment method in the dynamic environment, this paper gives the signal process figure of the east circuit, the north circuit and the azimuth circuit by using the theory figure and the design process of the strap-down inertial compass alignment. It deeply analyzes the reason of the bigger dynamic error. Using the method called “equal sensor bias”,the paper makes the velocity, acceleration and the changing of the latitude equal to the drift of the gyroscope and the bias of the accelerator. It also gives the expression of dynamic error of the east circuit, the north circuit and the azimuth circuit caused by the velocity and the acceleration, which is demonstrated by the simulation.