Research of Inertial Navigation Alignment for SINS Based on Open Circuit Compass Method

The gyrocompass alignment of strap-down inertial navigation systems (SINS) on stationary base was Discussed, Expressions of mathematical platform misalignment angles of the open-loop algorithm are derived and parameter identification method is used to pick-up the corresponding coefficients from angle measurements in order to identify and compensate gyro drifts and platform misalignment. The simulation results show that the open circuit gyrocompass alignment of SINS can all meet the requirement of SINS initial alignment with high accuracy and quick reaction on stationary base.