Shock Experiment Results of the DFuze 8-Channel Inertial Sensor Suite That Contains Commercial Magnetometers and Accelerometers

摘要

This report describes shock experiments performed on a 1.4-inch (35. 56-mm) diameter double-sided board that contains an inertial sensor suite (ISS) in support of the ongoing U.S. Army Research Laboratory diagnostic fuze (DFuze). The DFuze represents a high-g projectile-borne measurement system for obtaining in-bore and in-flight ballistic data that significantly contribute toward the design, development, failure diagnostics, and aerodynamics determination of artillery or other projectiles. The ISS uses several commercial off-the-shelf micro-electro-mechanical systems accelerometers, magneto meters, and optical sensors used for determining estimates of the projectile's body orientation, axial acceleration, radial acceleration, and roll rate. During the ground experiments, ISS boards were encapsulated within a specially designed fixture and shocked while powered in various orientations to simulate high-g set-back, set-forward, and balloting launch conditions. Post-shock performance of each sensor was then obtained to determine bias offset, scale factor errors, and shock survivability. The shock experiments were performed on a high velocity and acceleration shock machine at Aberdeen Proving Ground, Maryland. As a result of these experiments, the ISS boards have been g-qualified to at least a 19-kg launch acceleration while powered. The ISS boards will be used in ongoing DFuze flight experiments in support of the following Navy and Army developmental projectile programs: Extended Range Guided Munitions, Advanced Gun System, Autonomous Naval Support Round, XM982 Excaliber, and Tank Extended Range Munition Kinetic Energy XMI007. To date, 30 ISS boards have been flight tested without any failures.