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Novel Control Technologies for Guidance of High-Spin Stabilized Munitions


OBJECTIVE: Develop novel technologies for control systems for flight trajectory correction of guided spinning munitions. The technologies being sought must be applicable to the integration of controls for performance enhancements of munition trajectories with low (around 20 Hz) as well as high (200Hz or higher) spin rates, be low cost to produce and consume minimal electrical energy. DESCRIPTION: Different technologies and related components have been developed or are under development for guidance and control of guided munitions, including gun-fired munitions and mortars. Many of these devices have been developed based on technologies used in missile and aircraft, and are difficult or impractical to implement on gun-fired projectiles and mortars with their very different guidance, control and stability characteristics and operational requirements. Other technologies developed for munitions applications are suitable for non-spinning rounds or for rounds with very low spinning rates. Current guidance and control technologies and those under development are not effective for flight trajectory correction of high-spin guided munitions. Such spin stabilized rounds may have spinning rates of 200 Hz or higher, which pose numerous challenging sensing, actuation and control force generation and control algorithm and processing issues that need to be effectively addressed using innovative approaches. The focus of this SBIR project is the development of novel, low-cost and low power consumption technologies for flight trajectory control of high-spin rounds that occupy small munitions volume. The proposed novel technologies must be applicable to direct fire/intercept munitions with setback accelerations in the range of hundreds of G"s to over 50 KGs; and spin rates of 20Hz to 200 Hz or higher, providing impulse in the range of 10N-sec to 140 N-sec for up to 2 milliseconds. The proposed technologies must be scalable to medium as well as large caliber munitions. The proposal must consider the cost and manufacturing issues. Reliability is also of much concern due to the harsh launch environment and since the rounds need to have a shelf life of up to 20 years and could generally be stored at temperatures of sometimes in the range of 65 to 165 degrees F with a shelf life of up to 20 years. PHASE I: Develop novel technologies for flight trajectory correction of guided spinning munitions based on the proposed concepts for use in the next generation of guided munitions. Proposer must develop analytical and/or quantitatively show models to study the feasibility of each concept and calculate their performance and present a detailed report of the findings that show feasibility and potential to advance for further development. PHASE II: Develop prototype of the flight trajectory correction system for a selected spinning round based on the optimum design arrived at from the project modeling and simulation efforts. 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 extending the range of hypervelocity munitions, direct fire and intercepting munitions. 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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