Low cost guidance and control solution for in-service unguided 155mm artillery shell


  1. Gagnon, E.
  2. Lauzon, M.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
Guidance and control of artillery projectiles will be critical to future military operations. With the large quantities of unguided artillery shells stockpiled around the world, the course correction fuze could provide an attractive and cost-effective solution for munition control. This report proposes a drag brake and a spin brake course correction fuze concept, and compares their performance against the roll-decoupled four canard configuration. Specific guidance and control functions were designed and tuned for each using the 155 mm spin-stabilized artillery projectile as baseline. Dispersion sources included variations in muzzle velocity and gun’s azimuth and elevation angles relative to nominal conditions, and wind velocity perturbations. Monte Carlo simulations were performed to analyze the delivery accuracy. Results show that the drag brake concept compensates for muzzle velocity and longitudinal wind perturbations efficiently. The spin brake concept compensates for perturbations in lateral wind efficiently and, to a lesser extent, in the gun’s azimuth. The roll-decoupled four canard configuration counteracts gun’s azimuth and elevation perturbations very well. A course correction fuze combining the drag brake and spin brake concepts is shown to be a good solution to increase the projectile accuracy when all disturbances studied are present.

Il y a un résumé en français ici.

Report Number
DRDC-VALCARTIER-TR-2008-333 — Technical Report
Date of publication
01 Jul 2009
Number of Pages
Electronic Document(PDF)

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