Use of Single and Multiple Model Kalman Filter for Independent Fuze Safeing
Small Business Information
Scientific Systems Co., Inc. (Currently Scientific Systems Company, Inc.)
500 West Cummings Park, Suite 3000, Woburn, MA, 01801
Abstract"Some of the general purpose bombs in use by the Air Force andNavy (for example the MK80 and M117), are equipped with an air-driventurbine alternator (the FZU-48 produced by Alliant Techsystems).This air-driven turbine alternator has a double function:it provides the electric power to the fuze(s), and alsois used as a way to activate the fuze. The air turbineprovides power to the fuze only when the bomb is detached fromthe airplane (lanyard activation) and is traveling at a speed above agiven threshold. Nowadays, most general purpose bombs are equipped witha battery that supplies power to all the on-board electronics. Elimininating the air-driven turbine alternator will decrease thebomb drag, as well as reduce the cost, but will requirea new system to activate the fuze.The goal of this Phase I effort is to develop a low-cost, reliablefuze activation systems that relies only on pre-existing on-boardhardware, and to investigate, via simulation,the performance of such system. The fuze activation system willuse information provided by the bomb's navigation system(IMU and GPS) and otherexisting on-board information, including the lanyard and thenumber of GPS satellites in-view by the bomb.An Interacting Multiple Model (IMM) Kalman filter,will be used to detect the bomb's free-falling condition from otherdynamic situations, including aircraft maneuvers.The following tasks will be performed under the Phase I effort:1) Obtain dynamic m
* information listed above is at the time of submission.