On the Azimuth Error of ESG Strapdown North-Seeking Instrument

摘要

Because the vector of angular momentum of ESG (electrostatically suspended gyroscope) maintains the fixed direction in inertial space, it may be regarded as a fixed star. The astronavigation algorithm is used to estimate the azimuth angle and the gyro constant drift in this paper. The relative errors which affect the estimation accuracy of the azimuth angle are also analysed.