Effect of three error models on north-seeking precision for differential laser gyro with four frequencies;

In order to satisfy the demand of fast high precision independence north-seeking,the accelerometer dynamic northseeking(also by the name of non-gyroscopic north-seeking) system based on Coriolis effect was lucubrated.

Precision,speed and automatic degree of gyroscope are needed to be improved in modern north-seeking measurement.

Transmit method is used to precise north finding in the system of mechanical gyroscope.

In some area, the signals of two satellites of Beidou System are not available simultaneously, so the paper developed a new fast north finding method using only one geostationary satellite, and analyzed the azimuth system error caused by the turntable tilt.

3/4 period transit method in intelligent north-finding gyroscope system;

Application of complex north-finding method in auto-gyroscope system;

Study on Automatic North-finding Key Technique of Gyroscope;

A new signal denoising method based on wavelet-domain hidden Markov tree model(HMT) was proposed,which was applied to data-denoising for north-finder.

Theory analysis and design for the north seeking instrument using accelerometer;

An improved integral measuring method of pendulous gyroscope is developed to shorten the north seeking time and improve the measuring precision.

A new north seeking method named Three Points Orthogonal Sampling is introduced to input the gyro with the cosine component of the Earth’s horizontal spin velocity.