Lightweight Modular Precision Gimbal Systems

Beam steering and LOS correction elements for future airborne threat detection and counter-weapon applications require performance capabilities that exceed those available from commercial gimbals. Architectures seek lightweight, modular, precision gimbal systems that can handle the inherent nonlinearity of airborne disturbance environment; possess high specific stiffness of the gimbal structure for high performance; and provide high-resolution and rate stabilization over two-axes of articulation. SSG Precision Optronics proposes the development of a high performance, fiber-optic gyro-stabilized, two-axis, precision gimbal system based upon technologies we have demonstrated in the Aerojet Scan Mirror Assembly and the Pointing Mirror Assembly for Geosynchronous Imaging Fourier Transfer Spectrometer (GIFTS). Key mechanisms important to the proposed gimbal design are Inductosyn position encoders, tangentially mounted Lorentz force actuators, precision contact bearings, pivot flexures, and fiber-optic gyroscopes. Materials for consideration include reaction-bonded silicon-carbide for the mirror substrate, and fiber-reinforced SiC for the gimbal structure. The design form proposed will most likely resemble the Aerojet SMA and GIFTS PMA but will incorporate technologies suitable to the end-application. Applicable components and devices will also be prototyped and evaluated within the Phase 1 which will produce a gimbal design model for prototyping in Phase 2.