Modeling and Compensating Method of Temperature Error for Fiber-optic Gyroscope

Temperature is the key factor causing output error of fiber-optic gyroscope(FOG). To improve output precision of FOG, the temperature characteristic of FOG is theoretically analyzed, and zero drift test and rate test in full temperature range (-300 ℃～+700 ℃) are conducted. Based on the analysis of the experimental data, error compensating models of temperature versus zero drift and temperature versus scale factor are established using polynomial method. Experimental results indicate that the compensation model can improve output precision of FOG in full temperature range by one order of magnitude.