AUTOMATIC GAIN CONTROL OF A CLOSED LOOP FIBER OPTIC GYROSCOPE USING NON-LINEAR CONTROL LAWS

摘要

In order to expand the electric information which from the optical fiber gyroscope (12) is output, profit of the variable gain amplifier (20) which is arranged is controlled in order actual profit level to offer the automatic gain automatic gain control (AGC) response which is stabilized unrelated. It gives to the phase modulator (16) where the perturbation fill circuit (14) connects perturbation signal d to the optical fiber gyroscope (12). When size of perturbation inside the expansion signal which from the variable gain amplifier (20) is output the perturbation compensating circuit (24) the perturbation compensating signal in addition to the signal which from the variable gain amplifier (20) is output is reduced the signal which is compensated by is formed. The profit error signal which displays the size of the perturbation signal where the profit error circuit (28) which connects to the perturbation compensating circuit (28) after the perturbation compensating remains inside the expansion signal is caused. The feedback system (32,34) giving the gain control signal to the variable gain amplifier (20), size of the profit error signal is reduced.