Research on temperature compensation technology for fiber optic gyroscopes based on FISCSO-BPNN model and temperature field modeling

Fiber optic gyroscopes (FOG) have been widely used in aerospace, aviation, navigation, and other fields due to their excellent performance, such as small size, light weight, fast response, and high precision. However, changes in environmental temperature significantly affect the output accuracy of fiber optic gyroscopes, limiting their application precision in complex environments. To effectively address this issue ， a fusion temperature-based ISCSO-BPNN temperature compensation model (FISCSO-BPNN) was constructed by integrating the key temperature characteristic points, experimental set temperatures, and measured temperatures as inputs, with the gyroscope's bias data under temperature fluctuations as the output. Experimental results showed that the bias stability of the FISCSO-BPNN model improved by approximately 68.6% compared to the non-compensated scenario, and it outperformed the ISCSO-BPNN model in terms of compensation effectiveness.