1 March 2011 Research on lock-in correction for mechanical dithered ring laser gyro
Author Affiliations +
Optical Engineering, 50(3), 034403 (2011). doi:10.1117/1.3554393
Although a sinusoidal bias method is introduced to avoid working in the death band for a majority of time, the mechanical dithered ring laser gyro (RLG) still encounters information loss when crossing the zero rate point. A novel lock-in error correction method is proposed which can pick up the lost information and remove the random walk error radically. The lost information at the zero rate crossing can be expressed by such parameters as the phase and phase acceleration of a beat frequency signal. These parameters are sampled every time the phase crosses the zero rate point, and two correction trains are formed. Using the minimum variance method, the correction trains are properly scaled to compensate the output of RLG. Experiment shows that even in a bad working condition, this method can achieve satisfactory results.
Zhenfang Fan, Hui Luo, Shaomin Hu, Guangzong Xiao, "Research on lock-in correction for mechanical dithered ring laser gyro," Optical Engineering 50(3), 034403 (1 March 2011). https://doi.org/10.1117/1.3554393


Digital signal processing

Error analysis

Signal processing

Signal detection

Analog electronics

Field programmable gate arrays

Back to Top