A closed-loop control method for fiber optic gyroscope
A technology of closed-loop control and fiber optic gyroscope, applied in the direction of Sagnac effect gyroscope, etc., can solve problems such as unsatisfactory noise suppression effect, bit error of analog-to-digital converter, increased gyro noise, etc., to improve noise suppression effect and Accuracy, removal of AD measurement error, and the effect of suppressing abnormal bit errors
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[0046] Example. A closed-loop control method for a fiber optic gyroscope, comprising the following steps:
[0047] In the first step, the optical path signal is driven by the post-amp modulation signal to form a comb-shaped voltage signal and enter the analog-to-digital converter AD;
[0048] The second step is to use the digital processor to perform sampling successively in two adjacent sampling periods P and S to obtain the corresponding sampling values; and perform consistency check on the collected sampling values in the two sampling periods to remove the mutation point, get the phase error ΔV;
[0049] The third step is to integrate the phase error ΔV to generate a sawtooth wave;
[0050] The fourth step is to provide the generated sawtooth wave to the digital-to-analog converter DA;
[0051] The fifth step is to superimpose the square wave modulation signal into the digital-to-analog converter DA, and superimpose it with the sawtooth wave to form a ladder wave;
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