An Asymmetric Projectile With Activating Canards

Report No. ARL-TR-5620
Authors: Gene Cooper; Frank Fresconi
Date/Pages: August 2011; 26 pages
Abstract: Driven by the creation of new smart projectile concepts with maneuver capability, researchers are finding that projectile configurations with large aerodynamic asymmetries are becoming more common. Standard linear stability theory for projectiles assumes the projectile is symmetric, both from an aerodynamic and mass properties perspective. The work reported here extends standard projectile linear theory to account for aerodynamic asymmetries caused by actuating canards. Differences between standard linear and the extended linear theory reported here are highlighted. To validate the theory, time simulation of the extended linear theory and a fully nonlinear trajectory simulation are made for a representative scenario with excellent agreement noted. The extended linear-projectile theory offers a tool to address flight stability of projectiles with aerodynamic configuration asymmetries.
Distribution: Approved for public release
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Last Update / Reviewed: August 1, 2011