Design of Optimal Degaussing Electronics for Ring Laser Gyroscope

Abstract: Ring laser gyros are effective tools for large scale geodetic surveying at a high level of accuracy. They allow rotation of a sensor block with the system and analytical transformation of the output to the coordinate frame of interest such as frequency difference between two oppositely directed laser beams. This paper includes, elimination of the remnant magnetic field in a rectangular coil carrying current efficiently at some point of time by using optimal analysis. To eliminate the remnant magnetic field, one of the methods called degaussing is used. This can be achieved by PWM by changing the duty cycle in different ways. The design of optimal degaussing electronics by optimization principle comprises of selecting one of the three degaussing models described.

Keywords: Ring Laser Gyroscope, Space Vehicle, Laser Beam, Magnetic Field, Degaussing, Bias, Applied Voltage Time, PWM, Duty Cycle, Optimization.