Gyroscope Error Model Investigation for the Sperry SLIC-15 Ring Laser Gyroscope.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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Power spectral density measurements from .001 to 8.33 Hz are made of the output noise of the SLG-15 laser gyroscope used in the SLIC-15 IMU manufactured by Sperry Gyroscope Company. A detailed discussion of the operation of the SLG-15 laser gyro is presented along with a description of its optical dither mechanism. The digital output of the gyroscope is analyzed using correlation techniques to characterize the noise. A description of the analysis technique and the test station used for the measurements is given along with representative samples of the output noise. Particular attention is paid to the effect of the dither mechanism on the output power density spectrum. The tests show that the low frequency noise due to dither is a characteristic of the dither mechanism and not a characteristic of a particular SLG-15 laser gyro. Based on the test data a linear low frequency model is constructed for both the dithered and undithered case. Author
- Lasers and Masers