Current stabilizer design for Differential Laser Gyro

The Langmuir flow induced by current asymmetry is a big factor of DILAG´s null error. Based on physical principle of current stabilizing, a fuzzy PID controller is designed to symmetrize and stabilize the current of DILAG´s two arms. Simulated and experimental results show that the fuzzy PID controller is superior to the conventional PID controller in dynamic steady performance, and the fuzzy PID controller features stronger null stability, therefore higher DILAG´s performance.