The Ring Laser Gyroscope North-Finder plays an important role in navigation area as it can provide orientation reference. In practical application, the RLG is usually fixed on a certain base, whose shaking caused by wind and work of engine will decrease the precision of North-Finder. Thus the problem of the base shaking must be solved. On the basis of the basic fundamental of the North-Finder, the paper does research on how to improve the precision of North-Finder based on Ring Laser Gyroscope on shaking base. Firstly, the paper builds an error model of RLG North-Finder and on this basis analyzes that the kinds of errors influence on the precision of North-Finder. Theoretic and experimented analysis about precision of North-Finder on shaking base is done. Secondly, the paper summarizes the disadvantages and advantages of several kinds methods of base shaking compensation and processing. The paper analyzes the characters of the signals of the Ring Laser Gyroscope North-Finder on shaking base. On this basis, the paper tries many possible methods to improve the precision. In the end, a method composed of wavelet filtering and grouping weighting is proposed to process the signal of the Ring Laser Gyroscope North-Finder on shaking base. The simulation results and the experiment measurements show that the method proposed in the paper can improve the precision of North-Finder based on Ring Laser Gyroscope on shaking base. |