末端区域4D导引的水平轨迹计算方法

末端区域４Ｄ导引首先生成轨迹，然后生成沿该轨迹飞行的高度剖面，合理的速度剖面，最后生成自动引导飞机在规定时间着陆的４Ｄ导引指令。现简要讨论末端区域４Ｄ导引理论，主要推导了生成末端区域４Ｄ导引的首要算法－－水平飞行轨迹的计算方法。数值仿真结果表明，该方法只输入少量的航路点坐标数据和限制参数，就能计算出沿直线和曲线飞行的水平轨迹。

Ground Track Counting Method ofthe 4D Guidance in Terminal Area

Abstract To generate and realize 4D guidance in the terminal area, first there should be ground track , then the altitude profile and appropriate speed profile along the track. With all those obtained, can 4D guidance command be realized, guiding aircraft to land automatically within the fixed time. This paper briefly discusses the terminal area 4D guidance theory, and concentrates on chief method of ground track computation. The digital simulation results show the ground track of the straight flight and the curve flight can be worked out with the key - in of only a few waypoints coordinates and constraint parameters.