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Low Energy Consumption Compact Control Actuation Systems for Precision Guided Artillery and Mortar Munitions


OBJECTIVE: Develop innovative control actuation systems (CAS) that deliver required flight maneuver and attitude control forces at significantly lower energy consumption levels compared with current electro-mechanical CAS systems utilized in precision guided artillery, mortar munitions and long range munitions. DESCRIPTION: Electro-mechanical control actuation systems utilized in precision guided artillery and mortar munitions typically require between 4,000 joules to 8,000 joules of on-board energy to deliver the maneuver and attitude control necessary in achieving required precision for the duration of flight from muzzle exit to target. The capability to deliver the control authority needed at reduced energy consumption provides significant advantages including increased volume for delivered payload, reduced signature, improved safety and reliability, and lower unit cost. Proposed solutions must be compatible with common guidance and navigation control algorithms and command structure, and should operate in both closed-loop and open-loop modes. The proposed novel technologies must be applicable to medium and to long range munitions with setback accelerations in the range of 15KGs to 30KGs or higher, providing impulse in the range of 600 N-sec to 900 N-sec averaged over 30 seconds to 40 seconds and minimum lateral force of 100N to 200N, and long range munitions applications requiring over 6000 N-sec averaged over 50 seconds with minimum lateral force of 800N. Additionally, successful approaches must conform to geometric restrictions and interface requirements associated with the initialization, loading, launch, and flight phases of the munition. In all cases, the proposed solutions must be capable of reliable operation after exposure to environmental conditions including cold and hot temperature extremes in the range of -65 degree F to 165 degree F, shock and vibration, the elements (e.g. dust, salt water spray, rain, humidity, etc.), hot gun gases, high gun launch accelerations in both axial and lateral directions, tip-off loads at muzzle exit, and potential aero-thermal heating under some conditions. Proposed solutions must also meet 20 year shelf life requirements. Proposed solutions should address medium to long range munitions actuations requirements and require no greater volume or envelope than current CAS systems, with an objective to reduce occupied volume compared with existing systems. PHASE I: Develop novel technologies for flight trajectory correction of guided and smart munitions for artillery and mortar munitions. The phase I effort should include studies of the impact of affordable precision on the fires mission for smart artillery and mortar munitions. Present analytical and feasibility studies which would significantly and economically enhance the accuracy and/or performance of existing artillery projectiles both improving efficiency and decreasing the combat logistical burden. Develop analytical and/or numerical models to study the feasibility of each concept and calculate their performance. PHASE II: Develop prototypes to demonstrate flight trajectory correction control technologies for precision guided and smart munitions. Perform laboratory tests on instrumented test-bed developed for this purpose to validate the performance of the system and its various components. Perform wind tunnel tests to validate the performance in near to actual flight conditions. Design and fabricate a final prototype based on the results of the laboratory and wind tunnel tests. PHASE III: The end vision of this SBIR effort is the insertion of the developed novel flight trajectory correction technology for artillery and smart mortars. A second insertion would be for course correction and terminal guidance for mortar, artillery and fuzing systems. PM MAS (Program Manager Maneuver Ammunition Systems) and PM CAS (Program Manager Combat Ammunition Systems - Mortar). REFERENCES: 1. Austin Hughes, 2006,"Electric Motors and Drives: Fundamentals, Types and Applications - 3rd Edition,"Elsevier Ltd., Burlington, MA. 2. Chopara, I., 1995,"Review of Current Status of Smart Structures and Integrated Systems,"Proceedings of Smart Structures and Materials Conference, SPIE 2721-01, San Diego, California. 3. Military Handbook MIL-HDBK-762(MI),"Design of aerodynamically stabilized free rockets", 1990. 4. Hoerner, S. F.,"Fluid dynamic drag Practical Information on Aerodynamic Drag and Hydrodynamic Resistance", Published by the author, 1965. 5. Gillespie, P. G., Weapons of Choice: The Development of Precision Guided Munitions, University Alabama Press, 2006.
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