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TECHNICAL PAPERS

Performance of a Smart Direct Fire Projectile Using a Ram Air Control Mechanism

[+] Author and Article Information
Siddharth Chandgadkar, Mark Costello, Bertrand Dano, James Liburdy, Deborah Pence

Department of Mechanical Engineering, Oregon State University, Corvallis, OR 97331

J. Dyn. Sys., Meas., Control 124(4), 606-612 (Dec 16, 2002) (7 pages) doi:10.1115/1.1514666 History: Received June 01, 2001; Revised May 01, 2002; Online December 16, 2002
Copyright © 2002 by ASME
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References

White, C. O., Hempling, N. G., Prodan, R. J., and Conboy, L. W., 1982, “Automatic Cannon Caliber Maneuvering Projectile: Design Concept Study,” Ford Aerospace and Communications Corp., Newport Beach, CA, Final Tech. Report, ARRADCOM Support Activity, Picatinny Arsenal, NJ.
Etkin, B., 1972, Dynamics of Atmospheric Flight, John Wiley and Sons, New York, NY.
McCoy, R., 1999, Modern Exterior Ballistics: The Launch and Flight Dynamics of Symmetric Projectiles, Schiffer Military History, NJ (ISBN 0764307207).
Gast,  R., Morris,  S., and Costello,  M., 2000, “Simulation of Shot Impacts for the M1A1 Tank Gun,” J. Guid. Control Dyn., 23(1), pp. 53–59.
Zucker, R., 1977, Fundamentals of Gas Dynamics, Matrix Publishers, Chesterland, OH (ISBN 0-916460-12-6).
Thompson, P. A., 1972, Compressible-Fluid Dynamics, McGraw-Hill.
Merhav, S., 1996, Aerospace Sensor Systems and Applications, Springer Verlag Inc., New York, NY. (ISBN 0387946055).
Slottine, J. and Li, W., 1991, Applied Nonlinear Control, Prentice Hall Inc., Englewood Cliffs, NJ (ISBN 0-13-040890-5).
Costello, M., and Anderson, D., 1996, “Effect of Internal Mass Unbalance on the Terminal Accuracy and Stability of a Projectile,” Proc. of 1996 AIAA Flight Mechanics Conf., San Diego, CA.

Figures

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Pitch angle versus time
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Total velocity versus time
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Angle of attack versus time
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Ram air control mechanism schematic
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Projectile position coordinate definition
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Projectile orientation definition
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Ram air cavity flow schematic
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Cross range versus range
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Y Ram air force versus time
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Z Ram air force versus time
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Dispersion for a 3-mm diameter controlled ram air orifice versus an uncontrolled free flight configuration (uncontrolled dispersion radius=1.6 m, controlled dispersion radius=0.04 m)
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Effect of orifice diameter on dispersion radius (sensor bias and noise equal zero).
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Dispersion radius versus sensor bias and noise

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