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.
Efficiency Analysis of Canards-Based Course Correction Fuze for a 155-mm Spin-Stabilized Projectile
Journal of Aerospace Engineering ; 29 , 6
2016-07-11
Article (Journal)
Electronic Resource
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