Aerodynamic characteristics analysis and optimization of climb trajectory for ramjet guided projectile
To achieve the minimum fuel consumption during climb trajectory,the aerodynamic characteristics analysis and integrated optimization design of trajectory/engine for cruise ramjet guided projectile are carried out.This paper uses engineering algorithm to analyze the aerodynamic characteristics of projectile,comprehensively considers the coupling characteristics of engine with aerodynamics and trajectory system,establishes trajectory optimization model of the projectile under multiple constraints.The Radau pseudo-spectral method is used for trajectory optimization of climb phase.The simulation results indicate that designed shape of projectile has good aerodynamic and maneuverability characteristics,and compared with the scheme of only optimizing the angle of attack,the integrated optimization scheme can reduce fuel consumption by 5.7 kg,which can provide more endurance fuel for the cruise phase.
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