Initial alignment technology of strapdown inertial navigation system based-on stationary base

Initial alignment is one of the key technologies of strapdown inertial navigation system, the accuracy of strapdown inertial navigation system is directly affected by the accuracy of initial alignment, and the rapid reaction capability of strapdown inertial navigation system is decided by the alignment time. In this paper, the output error and the random drift of the inertial accelerometers and gyroscopes, and the frequency domain analysis of the classical control theory were used to study initial alignment error model. On the basis of Kalman filter principle, the state equation and observation equation were established, and the simulation and analysis of initial alignment were done at the same time. Simulation results show that the algorithm is simple and is easy to achieve, and effectively shortens the time of initial alignment, it is a more ideal alignment program.