Extraction of Rotation Information from a Simulated Fiber Optic Gyro Using Amplitude Modulation.
Abstract
The purpose of this experiment was to determine feasibility of the amplitude modulated dither technique of extracting rotation information from a fiber optic gyroscope. By varying the amplitude of the modulation appropriately, information can be obtained at points on the output intensity curve that are most sensitive to rotation. These points are also in the most linear region of the curve. A Michelson interferometer is used to simulate a Sagnac interferometer undergoing rotation. A digital control loop processes the information obtained by amplitude modulation and generates a feedback signal to null the path length difference. The feedback signal is monitored while a rotation simulation signal is introduced to the interferometer. The feedback signal tracks the simulation signal at 180 degrees out of phase (negative feedback). The test setup performs as expected to the hardware and operating frequency limits. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1983
- Accession Number
- ADA138092
Entities
People
- D. J. Brett
Organizations
- Air Force Institute of Technology