SIGNAL PROCESSING CIRCUIT FOR RING LASER GYRO, AND RING LASER GYRO DEVICE

摘要

PROBLEM TO BE SOLVED: To solve the problem that dither control is impossible due to failure of dither pick-off by achieving simplification of assembling by regarding a piezoelectric element for dither detection as unnecessary.;SOLUTION: A signal processing circuit for a ring laser gyro includes a gyro output processing part 40 and a dither drive circuit 30. The gyro output processing part 40 includes: an A/D convertor 41 for A/D converting a dither drive signal; an adaptive filter 43 for outputting a dither signal by inputting the output of the A/D convertor 41 to perform adaptive filter calculation; a subtractor 44 for outputting gyro output after correction by subtracting the dither signal from the gyro output; a multiplier 45 for multiplying the gyro output and the dither signal after correction; an error estimation part 46 for outputting an update value of a filter coefficient of the adaptive filter 43 to the adaptive filter 43 by estimating the error of the dither signal from the output of the multiplier 45; and a D/A convertor 47 for outputting a dither detection signal by D/A converting the dither signal.;COPYRIGHT: (C)2009,JPO&INPIT