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Session C7: Inertial Measurement Unit (IMU)

Toward GPS Denied Inertial Navigation using Hollow Core Fiber Based Resonator Fiber Optic Gyro (RFOG) Technology
Marc Smiciklas, Glen Sanders, and Wes Williams Honeywell Inc. Jeff Williams NTA Inc. Patrick Renfroe US Army DEVCOM/AvMC
Alternate Number 2

Honeywell has partnered with NTA Inc. and the U.S. Army Combat Capabilities Development Command (DEVCOM) Aviation & Missile Center (AVMC) to develop the RFOG based Enhanced Micro Inertial Navigator (eMINav). The intention of the eMINav system is to provide the highest possible inertial accuracy in a small rugged (high temp range, vibration, and shock) IMU to enable GPS denied navigation. This presentation will discuss major improvements to a key performance driving RFOG component, hollow core anti-resonant optical fiber, and improvements in gyroscope performance observed through its use. RFOG performance has hitherto been limited by non-linearity, modal impurity, and backscattering in sensing fibers. Our objective is to develop a fiber that provides the necessary optical performance to enable significantly better gyroscope performance than is currently available. Honeywell, AVMC, and AFRL have worked with the University Of Southampton to develop this fiber. By employing high-performance anti-resonant fiber, we show dramatically improved long-term stability over prior hollow-core fiber, and demonstrate a clear path to GPS denied performance. Build and test results from Honeywell’s first RFOG with anti-resonant hollow core fiber will be shown.
Distribution Statement A: Approved for public release.



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