Research On Essential Technique Of Airplane Cockpit Display System Based On FPGA

Airborne integrated display system which is used as the aircraft cabin major interactive interface isan important part of onboard avionics system. The performance of the system is directly related to pilotaccurately understanding the status of the aircraft. Therefore, airborne integrated display system designhas been a hot topic. According to the actual situation and needs of the current domestic airborneintegrated display system, this paper designed a display system which is based on a single FPGA core,without embedded software and hardware CPU core, which can achieve all the onboard graphicscomputing capabilities.Based on the functional requirements of the display system, as well as the characteristics of FPGA,this paper designed the hardware architecture of the display system, including the board-level hardwarearchitecture and FPGA internal module structure. The use of ping-pong operation and pipelinedarchitecture fully enhances the FPGA performance. For display system hardware architecture, wedesign a corresponding graphic elements generation algorithm, and different basic primitives generatedalgorithms are studied separately, proposing the corresponding algorithm implementation in FPGA,focusing on the anti-aliasing method implementation of each basic elements. This article also raises anew adaptive antialiasing video overlay algorithm, which is based on existing video overlay algorithm.This new algorithm can effectively improve the phenomenon that the anti-aliasing close-screen figuredisplays jagged dark edges in the remote-screen figure. Finally, the article describes the communicationprotocols and instructions between the display system and PC.Experimental results show that airborne integrated display system designed in this paper hasfeatures like the obvious effect of anti-aliasing, fast calculating speed, generating complex imagesunder higher frame rates, achieving no jagged dark side overlay between close-screen anti-aliasingfigure and aircraft external figure. On display effects and computing speed, the system meets the designrequirements. In the basis on the study of this paper, using FPGA as the prototyping tool can furtherdevelop domestic dedicated onboard graphics chip.