垂直剖面轨迹寻优算法的研究与仿真

Research and Simulation of Trajectory Optimization Algorithm for Vertical Flight Profile

飞机飞行导航性能优化问题,是飞行管理系统的一个基本功能。针对系统稳定性和实时性的要求,对能量状态法的性能优化模型进行了分析,通过研究升阻关系的飞机气动模型的修正,发动机性能参数的确定,操作限制的应用,Fibonacci搜索技术对算法的改进等仿真实现中的难点技术,将修正的优化模型与仿真软件FLSIM相结合,实现了不同航段控制模态的纵向制导功能,VAPS中实时显示了仿真飞行过程中的高度、速度寻优结果,仿真了优化垂直剖面轨迹。结果验证了改进优化算法与仿真平台的有效性和实用性。

Performance optimization is one of the indispensable functions for flight management system. Mathe- matical model based on energy state approach was analyzed. Key technologies for optimization were researched partly by modifying curve of lift force vs drag force in aerodynamics, simulation of engine performance parameters, applica- tion of restrained maneuver and improving optimization algorithm by Fibonacci search. Integrating the corrected model into a simulation - based design environment such as FLSIM, longitudinal guidance pertaining to different flight phase control mode was fulfilled. Also optimal altitudes, speeds and vertical trajectory were generated in VAPS. Simulation results were given to verify high efficiency of algorithm and usability of the platform.