Abstract: A physical model of frequency stabilization process of gyro is established based on the analysis of the operating principle of frequency stabilization servo system and the study of actual operating conditions of the system in total reflection prism laser gyro. The law of the distribution change of temperature gradient field in cavity with the servo system control in the control process of mode jump is obtained by using finite element method. The relationship between the number of longitudinal mode jumping and frequency stabilization servo parameters is derived. Finally, the experiments are designed to verify the best servo parameters by calculation. The experimental results show that the theoretical analysis is valid. This study is vital to insure the stable operation of servo system for laser gyro, and the results are useful to improve the control precision of digital circuits.

Key words: ordnance science and technology, prisms laser gyro, frequency stabilization system, finite element analysis