A simplified model of the compensation method for the thermal bias of a ring laser gyro

The bias drift generated by temperature characteristic of ring laser gyros (RLG) can deteriorate dramatically the performance of gyroscope. This thesis studies convenient bias drift compensation of RLG against thermal effects. The compensation effect in different compositions of the three temperature sensors is compared, and the result shows a sensor redundancy around the anode; thus the model is simplified, and four different experiments have been devised for validation. The result shows more than 2 times improvement of bias drift stability after compensation using the simplified model.