Efficiency Analysis of Canards-Based Course Correction Fuze for a 155-mm Spin-Stabilized Projectile

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Authors
  1. Gagnon, E.
  2. Vachon, A.
Corporate Authors
Defence Research and Development Canada, Valcartier Research Centre, Quebec QC (CAN)
Abstract
There are many course correction fuze concepts for improving the precision of a spin-stabilized projectile. Some of them consist in a despun fuze equipped with canards. Canards provide continuous and, possibly, modulable maneuvering capabilities in crossrange and downrange. This paper analyzes the efficiency of this type of course correction fuze and determines the best configuration for the canards. To do so, four concepts of canards-based course correction fuze are proposed and tested. To properly operate the fuzes, a guidance algorithm, based on point-of-impact prediction, and two autopilots, a poles/zeros cancellation controller and a proportional integrator controller, are developed. The fuzes efficiency is studied with their control authority footprint and achieved performances during Monte-Carlo simulations. All the tests are done with a pseudo-seven-degrees-of-freedom simulator including the developed algorithms. Those tests demonstrate that the four concepts significantly improve the precision of a spin-stabilized projectile and that, with the proposed algorithms, the best precision is obtained when the canards directly handle the projectile longitudinal acceleration.
Keywords
Guidance;Control;Weapon;Munitions;Projectile;Spin-Stabilized;Shell;Artillery;Gunnery;Course Correction Fuze
Report Number
DRDC-RDDC-2016-P083 — External Literature
Date of publication
29 Nov 2016
Number of Pages
10
DSTKIM No
CA043384
CANDIS No
804692
Format(s):
Electronic Document(PDF)

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