An Empirical Study on the Drift Mechanisms of Lissajous FM Gyroscopes: Amplitude, Frequency and Temperature Control
Abstract
Frequency modulated (FM) gyroscopes are a relatively novel of inertial sensors that can be used to estimate rotation rate. Based upon simple models, FM gyroscopes should be immune to effect that might cause the rate estimate to drift, but experiments have shown that the rate estimate can drift on the time-scale of hours. This work seeks to empirically demonstrate the test conditions and control system requirements needed to implement an FM gyroscope that does not drift. That is, the design of the amplitude, frequency, and temperature control systems. Different means to implement these controllers are discussed and tested in three different experiments that are detailed in this report. With some of these questions related to implementation answered, an FM gyroscope that maintains a bias instability below 10 deg/hr on long-time scale is demonstrated in this report. No model is needed to get these results and no trend of increasing bias with time is observed. This work ends with a short description of future work.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2022
- Accession Number
- AD1178025
Entities
People
- Andrew Sabater
Organizations
- Naval Information Warfare Center Pacific