Prediction of Swerving Motion of a Dual-Spin Projectile with Lateral Pulsejets in Atmospheric Flight

Abstract

Using the linear theory for a dual-spin projectile in atmospheric flight closed form expressions were obtained for swerving motion under the action of lateral pulsejets. Trajectory results generated by the linear theory equations and a fully nonlinear seven degree-of-freedom dual-spin projectile model agreed favorably. The analytic solution provided a relatively straight forward and computationally efficient means of trajectory estimation which is useful within smart weapon flight control systems. In order to accurately predict the impact point using the analytic solution, the dual-spin projectile linear model must be updated periodically. Terminal impact point prediction degrades rapidly as the linear model update interval is increased beyond a critical value. Control authority, as defined by the change in impact location due to a pulsejet firing, steadily decreases as a function of projectile down range position.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2005
Accession Number
ADA441073

Entities

People

  • Allen Peterson
  • Bradley Burchett
  • Mark Costello

Organizations

  • Oregon State University

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ballistics
  • Control Systems
  • Differential Equations
  • Equations
  • Equations Of Motion
  • Exterior Ballistics
  • Flight Control Systems
  • Impact Point
  • Intervals
  • Military Research
  • Physical Properties
  • Precision-Guided Munitions
  • Projectile Trajectories
  • Projectiles
  • Spacecraft
  • Trajectories
  • Weapons

Readers

  • Aerodynamics/Aeronautics.
  • Aerospace Engineering
  • Control Systems Engineering.