Micromechanical inertial guidance navigation and control systems in gun launched projectiles

Micromechanical technology applied to inertial instruments opens up many new applications where cost, size and power are important. One very important application is the guidance, ‘* navigation and control of gun launched projectiles. In order to be affordable these systems must cost less than $2,000, have very low power requirements and eventually fit into a standard NATO Fuze of 9 cubic inches, including all fuzing and safe and arming functions. Since 1997 when Draper demonstrated the fast successful launch from a Navy 5” gun of a Micromechcanical Inertial Measurement Unit and Global Positioning System (MMIMU/GPS) in a rocket assisted 5” projectile many new applications have been identified and are being pursued. Draper is presently ready to flight test a MMIMUIGPS in a spinning 5” projectile with the system despun in the nose mounted fuze assembly. This paper will describe the application of this technology to Navy and Army projectiles, both spin stabilized and non-spinning. Some of the projectiles described will be the Navy’s Extended Range Guided Munition (ERGM) Demo, the Army’s Precision Guided Mortor Munition (PGMM) 120 mm projectile and standard NATO Fuze applications to spin stabilized projectiles such as existing S’, 155mm, 12Omm, etc.