Journal ArticleDOI
Influence of Moving Internal Parts on Angular Motion of Spinning Projectiles
TLDR
In this paper, two types of internal parts motion are considered: linear motion of the centers of mass of the components relative to the external shell center of mass, and angular motion of components' spin axes with respect to the internal shell spin axis.Abstract:
Projectiles containing movable internal components, when compared with rigid but otherwise equivalent projectiles, have been observed to have different damping rates, range losses, and rapid spin-downs. Two types of internal parts motion are considered: 1) linear motion of the centers of mass of the components relative to the external shell center of mass, and 2) angular motion of the components' spin axes with respect to the external shell spin axis. Motions at the projectile's pitching and yawing frequencies are considered, and such motions are shown to explain the observed flight behavior. £read more
Citations
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Journal ArticleDOI
Guidance and Control Design for a Class of Spin-Stabilized Fin-Controlled Projectiles
Spilios Theodoulis,Vincent Gassmann,Philippe Wernert,Leonidas Dritsas,Ioannis Kitsios,Anthony Tzes +5 more
TL;DR: In this article, the authors present a complete design concerning the guidance and autopilot modules for a class of spin-stabilized fin-controlled projectiles, composed of two sections: the rapidly spinning aft part contains the charge, whereas the front part, which is roll decoupled from the aft, includes all the necessary electronic equipment and actuator devices needed for guidance and control.
Journal ArticleDOI
A survey on moving mass control technology
TL;DR: This paper surveys the contemporary progress and problems of moving mass control technology in various capacities including spacecraft, spinning projectiles, underwater vehicles, unmanned aerial vehicles, and re-entry vehicles, special attention is paid to the moving mass configurations and its corresponding layout design methods.
Journal ArticleDOI
Symmetric Missile Dynamic Instabilities
TL;DR: In this paper, the authors defined axial and transverse moments of inertia for a symmetric ballistic missile and defined the parameters of the two yaw model arms for a single-axis symmetric missile.
Journal ArticleDOI
Control Authority of a Projectile Equipped with a Controllable Internal Translating Mass
Jonathan Rogers,Mark Costello +1 more
TL;DR: In this article, a vibrating internal mass control mechanism applicable to both fin-and spin-stabilized configurations was proposed for a 7degree-of-freedom flight dynamic model of a projectile equipped with an internal translating mass.
Control Authority of a Projectile Equipped with a Controllable Internal Translating Mass
Jonathan Rogers,Mark Costello +1 more
TL;DR: In this article, a vibrating internal mass control mechanism was proposed for fin-and spin-stabilized configurations of a 7-degree-of-freedom flight dynamic model of a projectile equipped with an internal translating mass.
References
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ReportDOI
Free flight motion of symmetric missiles
TL;DR: In this paper, the linearized angular motion of a symmetric missile is developed in some detail with some consideration of the rolling motion, drag, aerodynamic jump and the effect of varying coefficients.
Journal ArticleDOI
Projectile instability produced by internal friction
TL;DR: In this paper, the stability of a spinning projectile which contains a cylindrical mass fitted loosely into a cavity but constrained to spin with the projectile is examined, and an unstable coning motion is obtained in which spin decay and cone angle growth are proportional to the coefficient of friction between the mass and the cavity wall.
Journal ArticleDOI
Measurements of the dynamical behavior of projectiles over long flight paths
TL;DR: Moyer, C. B. and Rindal, R. A., and Reed, G. W., "Graphite Ablation in High-Pressure Environments," AIAA Paper 68-1153, Williamsburg, Va., 1968 as discussed by the authors.
ReportDOI
Angular Motion of Projectiles with a Moving Internal Part.
TL;DR: In this article, the angular momentum for a projectile with a moving internal part is derived and quasi-linear solutions to the resulting differential equations are obtained, which explain the unusual behavior exhibited by four shells in 1955.