民航飞机按照性能的导航(Performance Based Navigation,PBN)飞行程序自动飞行,能够极大地提高飞行的自动化程度.但是利用模拟机来验证PBN飞行程序周期长,成本高.虽然利用计算机仿真系统来验证PBN飞行程序效率高,但难点在于飞行程序的读入、飞行程序三维构建以及飞机模型建模.为此提出了实时仿真验证系统的实现框架,以飞行动力学以及运动学为基础,实现了导航系统的建模,对飞行程序数据利用XML格式进行转换并读取,然后对飞行程序利用三维形式进行展示,同时利用Geometry Clipmap和Clipmap结构来实现地形的构建和渲染.仿真结果表明,系统能够实现对PBN飞行程序的读取、解析、三维航路构建以及实时飞行验证.PBN飞行程序仿真验证系统的实现,确保了飞行程序设计的完整性、有效性和可用性,降低了模拟机飞行验证的成本.%According to aircraft performance and related flight criteria, real - time automatic flight simulation and validation were executed to validate performance - based navigation (PBN) flight procedures. In this paper, the framework of real - time simulation system was proposed. Flight procedure data transformation process was researched and three - dimensional flight air routes were used to display the flight routes and protected areas of PBN flight procedure. The mathematical modeling of large - scale terrain was studied with Geometry Clipmap and Clipmap structure, and the navigation system model was set up based on the dynamics and kinematics of aircraft. The simulation shows, the system can realize the real - time flight simulation to validate PBN flight procedures, and this ensures the integrity, effectiveness and availability of PBN flight procedure design.
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