基于非线性规划的高超声速滑翔轨迹优化

研究了最大航程的无动力滑翔轨迹优化问题。为避免间接法的缺点,采用直接单重打靶法将轨迹优化问题转换为非线性规划问题,并利用非梯度优化算法和梯度优化算法相结合的混合优化策略得到最优轨迹。仿真结果表明,在采用更为真实的大气模型和动力学模型条件下,该方法具有较高的求解精度、收敛性以及鲁棒性,降低了初值要求;相对于最大升阻比轨迹,射程提高1.54%。

Optimization of Hypersonic Glide Trajectory Based on Nonlinear Planning

This paper investigates the maximum range glide problem.To avoid the drawback of indirect method,direct shooting method is used to convert the trajectory optimization planning problem into nonlinear planning problem.The problem is solved by combining the non-gradient-based optimization technique and gradient-based optimization technique.The numeric result shows that the hybrid method adopted in the paper can solve the maximum glide problem with high accuracy,stability and robusticity in more realistic atmosphere model and dynamic equations.The range of optimal trajectory can be increased by 1.54% over the range of maximum lift-to-drag trajectory.