高超声速飞行器周期巡航轨迹设计与优化

针对高超声速飞行器,给出了参数建模方法并分析了其气动特性,建立了乘波体外形高超声速飞行器的纵向平面运动学模型;提出了高超声速飞行器巡航段周期轨迹的方案及相应的轨迹优化方法.采用高斯伪谱法解决周期性轨道优化问题,将原有的连续周期非线性优化问题转化为多段离散优化问题,并采用SQP算法求得最优解.仿真结果表明,在巡航航程相同的情况下,周期轨迹比稳态轨迹更省燃料.

Design and optimization of periodic cruise trajectory for hypersonic vehicle

In this paper,a parametric modeling method was given to analyze the aerodynamic characteristics of the hypersonic vehicle and to establish longitudinal dynamic model for wave rider-based vehicles.Then a periodic cruise trajectory optimization method for a hypersonic vehicle was proposed.Furthermore,Gauss pseudo-spectral method was applied in periodic orbit optimization problem by translating the original nonlinear optimization problem to a discrete optimization problem,and the optimal solution was obtained by using the SQP algorithm.Simulation results show that the periodic cruise trajectory can consume less fuel than the steady-state trajectory.