程序转弯是航空器进场阶段使用的一种反向飞行程序,程序转弯模板是用来量化转弯区范围的一种复杂图形,模板的主体由风螺旋线构成。传统模板绘制是基于手工做图的方法来实现,步骤复杂,不利于计算机的自动化处理。通过引入风螺旋线精确算法,可以准确实现程序转弯模板中的风螺旋线绘制、公切线计算,以及风螺旋线的趋势分析,使飞行程序模板的计算过程得到较大的简化,为计算机的自动化处理提供理论参考。 Program turn is a reverse flight procedure used during the approach of aircraft. Program turn template is a complex graphic used to quantify the range of turn areas. The main body of the form is made of wind spiral. The traditional template drawing is based on a manual method to achieve the figure, the steps are complicated and not conducive to the computer’s automated processing. By introducing the accurate algorithm of wind spiral, we can accurately realize the wind spiral drawing, the common tangent calculation and the trend analysis of the wind spiral spiral in the program corner template, so that the calculation procedure of the flight program template can be greatly simplified, and the computer automation Processing provides a theoretical reference.