Analysis of Ring Laser Gyro Errors during Path Length Active Stabilization

The paper considers active stabilization of a ring laser gyro (RLG) path length in a wide range of temperatures, using a movable mirror with a piezoceramic drive. Analysis of the main designs of piezo actuators used in the RLG made in Russia is presented. Computer models of piezo actuators have been developed to study the distortions and curvatures of piezo-driven mirror surfaces based on their resonant oscillatory characteristics. By comparing the calculated data and the experimental results, a relationship between the movements of mirrors and the output parameters of RLG has been found. Possible improvements of piezo actuator structures are proposed, which make it possible to increase the accuracy and performance characteristics of RLG.