Inertial Rate Sensors for Next Generation Interceptors

Inertial Measurement Units (IMUs) that can provide high-resolution Line of Sight (LOS) stabilization and accurate inertial pointing are needed to support future interceptor avionics systems advanced ballistic Missile Defense Systems (BMDS) missions. IFOS, bringing years of pioneering experience in Fiber-Optic Gyroscopes (FOGs), proposes developing an advanced, ultra-low weight FOG that can meet stringent conditions for interceptor IMUs, including withstanding radiation in excess 300 krad as well as the high shock and vibration that accompany launch, yet can also deliver excellent pointing accuracies with drift rates of 0.1 deg/hr and 0.003 deg/rt-hr angular random walk capabilities even after prolonged storage. IFOS will exploit innovative techniques including newly available radiation hard (RH) smaller fibers and optoelectronic components, tighter coiling, and packaging concepts that would allow substantial reductions in FOG weight and volume. Phase I will focus on design and subscale testing of proof-of-concept RH, lightweight FOG components and elements. In Phase II, IFOS will design and develop reduced size and weight RH FOG prototypes and will work with Lockheed Martin to incorporate the FOG within functional IMUs and develop testing and characterization protocols for performance demonstrations when subjected to radiation levels at thermal ranges of interest.