DITHER SIGNAL REMOVER FOR DITHERED RING LASER GYRO

摘要

A sampling method and apparatus for sampling a dither signal (22) includes the step of sensing a number of peak amplitudes P1, P2, P3... Pn each of the number of peak amplitudes having corresponding times t1, t2, t3... tn while simultaneously sensing a number of ring laser gyro output angles at each of the corresponding times t1, t2, t3... tn. A value of the gyro net output, DELTA phi , is calculated as DELTA phi =( phi n- phi n-1)-( alpha n- alpha n-1)K, where K is a correction factor. Alternatively, the stripped gyro angle output may be calculated as phi g= phi n- alpha nK. Where phi g is substantially equivalent to the sum of all of the changes in the stripped gyro angle, that is the sum of all DELTA phi 's. The correction may include corrections for gain, phase angle, nonlinearity, temperature bias and scale factors.