基于四维导引的飞机纵向飞行剖面的解算与综合

定常Mach/CAS型下降是一种符合驾驶员实际操纵特性的剖面下降方法,可方便地用于对进入终端空域的飞机进行四维导引和控制。本文研究了这种四维飞行剖面的计算与综合技术,分析了剖面的构成与结构特点;讨论了剖面解算的数值积分算法和简化代数算法;对飞行速度剖面,提出了双参数描述法来扩大对飞行时间的调整范围,并开发了相应的迭代算法;最后以波音707飞机为对象,进行了数字仿真计算,得到了满意的结果。

SYNTHESIS OF AIRCRAFT VERTICAL FLIGHT PROFILE BASED ON FOUR-DIMENSIONAL GUIDANCE IN TERMINAL AIRSPACE

Constant Mach/CAS descent is an efficient profile descent procedure which conforms to the operational properties of pilots. It can be used to the four-dimensional (4D) guidance and flight management of aircraft entering into terminal airspace. This paper gives a research on the computation and synthesis techniques of this 4D flight profile. Its constitution and structure characteristics are first analyzed. A numerical integration algorithm and a simplified algebraic algorithm are then presented for its computation. For time-control, two parameters are introduced to describe its speed profile, which can enlarge the time-control range, and the associated iteration process and algorithm to determine the speed profile for a given flight time requirement are developed. Finally, digital simulation is done for a Boeing-707 aircraft model, and satisfactory results are obtained.