Dual-Parameter Joint Temperature Error Compensation of IFOGs Scale Factor for Small Satellites

Aiming at the demand for higher precision and lower complexity in compensating for scale factor temperature errors in Interferometric Fiber Optic Gyroscopes (IFOGs), in this work, a dual-parameter joint compensation method based on the Multiple Linear Regression Model (MLRM). The relationship between the average wavelength and optical power of the light source is derived theoretically. Integration of optical power information and temperature information significantly improves compensation efficiency. Compared to the model without optical power information, the amount of calculation is reduced by 43.8% while maintaining the same level of precision. The implementation on a Field Programmable Gate Array (FPGA) has been carried out, resulting in a nearly 20-fold improvement in scale factor repeatability. This improvement confirms the effectiveness of the method. The implementation was constructed without any additional hardware devices, which aligns with the trend of miniaturization in space-borne IFOGs. This is particularly beneficial for small satellites.