先进战斗机过失速机动飞行航迹优化

Flight Trajectory Optimization of Post-Stall Maneuvers for an Advanced Fighter

过失速机动是先进战斗机的重要性能,飞行航迹优化是过失速机动中需要解决的关键问题。基于先进战斗机非线性动力学模型建立了过失速机动的优化模型;应用哈密顿函数构建了优化指标函数,并求解了相应的约束方程;提出了最速下降法和Newton法相结合的新算法对梯度下降法进行了改进,加快了寻优算法的收敛速度;选取了典型的Herbst机动具体分析了先进战斗机过失速机动的飞行航迹优化问题。最后,通过数字仿真验证了航迹优化算法的可行性和有效性。

Post-stall maneuver is one of the important capabilities of an advanced fighter, and flight trajectory optimization is the key problem which need to be solved in post-stall maneuver. The optimization model of the post-stall maneuvers is established based on the advanced fighter＇ s nonlinear dynamic model. The optimization index func- tions are constructed using the Hamilton function, and the corresponding constraint functions are solved. A new algorithm is put forward based on the steepest descent method and the Newton method for improving the gradient descent method, and the convergence rate is accelerated. The flight trajectory optimization problem is analyzed based on the typical Herbst maneuver. Finally, the feasibility and the effectiveness of the flight trajectory optimization algorithm are verified through simulation results.