Hybrid Trajectory Optimization Method and Tracking Guidance for Variable-Sweep Missiles

In this paper, an offline hybrid trajectory optimization approach is proposed for variable-sweep missiles to explore the superiority in the diving phase. Aiming at the maximal terminal velocity with the impact angle constraint, the trajectory optimization model is formulated under multiple constrain...

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Bibliographic Details
Published in:Mathematical problems in engineering 2021-03, Vol.2021, p.1-14
Main Authors: Wei, Zhifang, Cheng, Yang, Guo, Xiangxiang, Liu, Senlin
Format: Article
Language:English
Subjects:
Aircraft
Algorithms
Angle of attack
Constraint modelling
Design
Engineering
Guidance (motion)
Linear quadratic regulator
Methods
Missile tracking
Missile trajectories
Missiles
Nonlinear programming
Optimization techniques
Ordinary differential equations
Sea level
Spectral methods
Sweep angle
Terminal velocity
Trajectory optimization
Velocity
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Summary:In this paper, an offline hybrid trajectory optimization approach is proposed for variable-sweep missiles to explore the superiority in the diving phase. Aiming at the maximal terminal velocity with the impact angle constraint, the trajectory optimization model is formulated under multiple constraints, and the aerodynamic analysis in different sweep angles is discussed. Unlike only the attack angle used for the optimization process traditionally, the two-variable optimization scheme on both the attack angle and sweep angle is investigated for variable-sweep missiles. Then, the trajectory optimization problem is transformed into the nonlinear programming problem via a hybrid optimization strategy combining the Gauss pseudospectral method and direct shooting method to obtain the high precision and fast convergence solution. Finally, to verify the feasibility of the optimal trajectory under uncertainties, the tracking guidance law is designed on basis of the gain scheduled linear quadratic regulator control. Numerical simulation results reveal not only of the proposed hybrid optimization strategy but also of the superiority of variable-sweep missiles compared with traditional missiles.
ISSN:1024-123X
1563-5147
DOI:10.1155/2021/6669618