Comprehensive Optimization Method of Aerodynamic and Trajectory for Gliding Guided Projectile

Abstract

Aiming at the aerodynamic and trajectory design problem of gliding guided projectiles, this paper stu-died a comprehensive optimization method of aerodynamic and trajectory so as to improve the gliding performance of projectile. This optimization method used engineering algorithms for aerodynamic analysis and adaptive Radau pseudo-spectral method for trajectory analysis, and the static parameter optimization of aerodynamic shape and the dynamic optimization of angle of attack control law during the gliding process can be considered comprehensively. The mapping relationship between shape parameters and performance indicators (such as range and flight time) was established by using Kriging model, which realized the tight coupling of shape optimization and trajectory optimization. At the same time, the Kriging model was constantly updated by using the combined infill sampling criterion until convergence to obtain the optimal shape and optimal trajectory. This paper took the maximum range and shortest flight time/minimum consumption of control energy as the objective functions to comprehensively optimize the shape parameters of canard and tail of the gliding guided projectile. The simulation results show that the comprehensive optimization scheme has better trajectory performance when compared with the reference scheme. The Opt-1 scheme increases the range by 37.8%, the Opt-2 scheme can effectively reduce the flight time and reduce control energy consumption by 46% when attacking fixed targets, which verifies the feasibility and effectiveness of this comprehensive optimization method of aero-dynamic and trajectory.

Keywords

• |armament science and technology|guided projectile|aerodynamic optimization|trajectory optimization|surrogate model