Thrusters Pairing Guidelines for Trajectory Corrections of Projectiles

Abstract

Same as Report (SAR) 18. NUMBER OF PAGES 9 19a. NAME OF RESPONSIBLE PERSON

Walking the Precession for Trajectory Control of Munitions

“…This demonstrates that nutation can be controlled and decoupled from precession. Since the transverse linear velocities are coupled to the gyroscopic motion of the projectile, this enables a controller that could expand and contract the nutation angle to manipulate trajectory [5,6]. Repeated expansion and contraction of the nutation at specific states of the precession angle allows us to "walk the precession" and produce a nonzero average of the AOA throughout the precession cycle, which changes the bullet trajectory.…”

Robust gain-scheduled autopilot design for spin-stabilized projectiles with a course-correction fuze

“…The collateral damage, number of rounds used to intercept a given target and unit cost are also important facts for designers. To this end, several control mechanisms were recently proposed for the steering of these systems ranging from aerodynamic surfaces [9,16,19,24] to jet thrusters [3,7,11] or even inertial loads [18].…”

Dynamics design for multiple launch rocket system using transfer matrix method for multibody system

“…However, poor dispersion characteristics of rockets has always restricted the development of MLRS, which is an international problem that many people have been struggling to study for a long time. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] In the early 1980s, Cochran et al 2,3 presented the concept of passive control with a simple physical model for a single-round launcher/rocket system. They attempted to achieve dispersion reduction by optimizing support positions and springs stiffness in the model.…”