Guidance algorithm for projectile with rotating canards via predictor-corrector approach

This paper proposes a guidance algorithm for smart munitions such as a projectile with rotating canards. The proposed guidance algorithm consists of two parts: the prediction of ballistic impact position and the computation of acceleration command to correct the ballistic trajectory. In this study, the modified linear theory is reformulated for the dual-spin projectile and the specific frame is introduced to provide additional degree of freedom in the modified linear theory. By using these results, the predicted impact position is determined. Then, we discover the sensitivity of impact position changes with respect to the acceleration commands. Based on this investigation, the generation of acceleration command is proposed to reduce the impact position errors. In this study, the proposed method is tested using 7-DOF nonlinear simulations.