Coning reduction in spinning flying vehicles

Details

Title: Coning reduction in spinning flying vehicles
Author(s): Freeman, Paul Timothy
Advisor(s): Chang, Bor-Chin
Keywords: Mechanical engineering; Projectiles; Impulse Force Method
Date: 2011-09
Publisher: Drexel University
Thesis: M.S., Mechanical Engineering -- Drexel University, 2011
Abstract: Gun launched projectiles designed to maintain body spin can often exhibit a gyroscopic phenomenon called coning. Coning can increase a projectile's susceptibility to loss of control conditions and is generally undesirable. Using a simplified odel, an Impulse Force Method is proposed to reduce coning motion and any bias the projectile body exhibits with respect to heading direction. Simulation results show the proposed method is able to reduce coning and bias to within an acceptable region of the heading direction. The Impulse Force Method is then implemented in a full 6-DoF simulation of the Army Research Laboratory's Flight Controlled Mortar (FCM) system. A control scheme is developed using the FCM canards to create impulsive forces at the tip of the projectile and oppose any coning motion. FCM simulation results reveal the Impulse Force Method is capable of reducing coning motion and improving the overall range of the projectile.
URI: http://hdl.handle.net/1860/3887
In Collections: Theses, Dissertations, and Projects

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