Research On The Dithered Control Of The Dithered Ring Laser Gyro

As an ideal part of inertia navigation, the mechanically dithered ring laser gyro (MDRLG) has a lot of characters, such as low cost, long life, good reliability, large dynamic range and so on. The dithered control is the most important factor of the advance in the precision of MDRLG.The research of this paper is done systemic about the dithered control of MDRLG. At first, the function of the dithered mechanism is be researched particularly, and the basic theory of the disappearance of the dynamic Lock-in by the injection with random noise in the dithered control is also be researched completely.Then, the math model of the dithered system is built up, the theory of the dithered control is analyzed by the numerical value simulation. On this base, the sin signal with Gauss white noise and the square wave signal with the pseudo-random noise which be produced by M sequence from the register are separately simulated. After that, the efficiency of the injection in two kinds of signal is calculated. The experimentation has proved the validity of the models.Tthe peripheral control circuit is simulated in function by Multisim. The effect of the peripheral control circuit influenced by the temperature is analyzed. The compensation about the temperature is build up on the base of the analysis. The experimentation has proved that the compensation could improve the precision of MDRLG..Last,The effect of the physical characters in the Piezoelectric Ceramic Slice for the dithered control is analyzed. The motherd of using the contrary Piezoelectric Ceramic Slice is adopted. The effect of the temperature character in the Piezoelectric Ceramic Slice is discussed.