一种便携式DFTI模拟器的设计与实现  

Design and implementation of a portable DFTI simulator

作　　者：薛亚洲 罗霄[1,2] 张乐 XUE Yazhou;LUO Xiao;ZHANG Le(Chinese Flight Test Establishment,Xi’an 710089,China;Xi’an Yuanfang Aviation Technology Development Company Limited,Xi’an 710089,China)

机构地区：[1]中国飞行试验研究院,陕西西安710089 [2]西安远方航空技术发展有限公司,陕西西安710089

出　　处：《电子设计工程》2022年第12期58-62,共5页Electronic Design Engineering

摘　　要：为了模拟电传飞控计算机DFTI接口的输出特性,设计了一款与其接口特性完全匹配的便携式DFTI模拟器。该模拟器采用USB2.0接口与上位机通信,实现该设备的供电与配置;以FPGA中构建的MicroBlaze软核为控制核心,实现各功能模块的调度与管理;使用MIL-STD-1553B标准总线协议芯片与RS-422接口驱动芯片,实现了具有RS-422电平特性与MIL-STD-1553B总线组织结构特性的多路串行输出码流。各项实验结果表明,该模拟器具有体积小、通道多、操作简单、工作稳定可靠等特点。In order to simulate the output characteristics of the fly⁃by⁃wire flight control computer DFTI interface,a portable DFTI simulator that fully matches the interface characteristics is designed.The simulator uses the USB2.0 interface to communicate with the host computer to realize the power supply and configuration of the device;the MicroBlaze soft core constructed in the field programmable gate array is used as the control core to realize the scheduling and management of each functional module;The MIL-STD-1553B standard bus protocol chip and the RS-422 interface driver chip realize multiple serial output code streams with RS-422 level characteristics and MIL-STD-1553B bus organization structure characteristics.Various test results show that the simulator has the characteristics of small size,many channels,simple operation,stable and reliable work.

关 键 词：DFTI接口 MicroBlaze软核 USB2.0接口 MIL-STD-1553B总线 RS-422总线 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]