飞机座舱EADI画面高速填充的一种新方法

在飞机座舱电子飞行仪表系统中．电子式全姿态指示器(Electronic attitude director indicator,EADl)的天地区域的重新填充是个非常费时的工作。本文针对EADI画面的特点,提出一种基于新型双帧存交替切换结构和硬件实现边标志填充算法的图形显示系统设计新方法,通过给字符、天及地的区域边界设立不同的标志,由专用FPGA硬件根据标志采取相应的填充操作,实现区域的快速填充和字符的叠加。该EADI显示系统已研制成功，调试表明：EADI画面的图形填充速度提高了一个数量级,彻底解决了EADI画面生成中的速度瓶颈,具有较高的应用推广价值。

New High Speed Filling Method for EADI Graphics in Aircraft Cockpit

The filling of sky and ground region on the electronic attitude director indicator (EADI) in an aircraft electronic flight instrument system (EFIS) is a time-consuming work. According to the feature of the graphics of EADI,a new design scheme of the graphics display system based on a new structure of double frame buffer alternation and edge flag filling algorithm with special hardware is introduced. The scheme sets up three different flags for the character and boundary of sky and ground, takes corresponding operation dependeding on flags with special FPGA hardware,and realizes the rapid region filling and superposition of character. A preliminary trial shows that it can improve the filling speed for generating EADI graphics by one order, thereby solving the bottleneck of speed in the EADI graphics display system ultimately, and has high a value in application and popularization.