复杂环境下专用计算机的设计及验证

发布时间：2018-02-22 15:17

本文关键词： 复杂环境专用计算机快速切换 DSP FPGA　出处：《浙江大学》2012年硕士论文　论文类型：学位论文

【摘要】：本文在研制任务的要求下,展开了对抗复杂环境的专用计算机研究,完成了专用计算机的系统设计、软硬件实现、系统联试,并通过了各项环境实验考核。专用计算机的工作主频高达200MHz,有较强的运算能力。主机运算单元为两片TI-DSP C6747芯片。借助FPGA芯片完成对DSP芯片的状态检测和工作状态切换,本文提出并实现了基于DSP芯片的快速切换温备份技术,保证了专用计算机能够对外部接口进行接近无缝的连续操作。测试结果表明,DSP芯片切换时间最大为6.1μs。该专用计算机系统每片DSP芯片挂载了16M*32bit大小的SDRAM作为程序存储器。在FPGA芯片控制下,DSP芯片从NAND FLASH加载,并且可以操作8Gbit的FLASH空间,512Kbit的EEPROM空间；同样在FPGA的监测下,DSP芯片可以操作两路速率为720Mbps的LVDS接口、一路双通道冗余备份的1553B接口、5路速率为kHz量级的开关量输入接口、5路速率为kHz量级的时序输出接口；同时作为状态自检的手段,DSP可以操作一片实时时钟RTC芯片、通过两片板上的温度传感器芯片读取当前板上的温度。经过电系统功能覆盖测试,专用计算机工作在200MHz的主频下,存储器功能正常、实时时钟工作正常、温度传感器工作正常,DSP芯片能够完成快速的切换,并且720Mbps下的LVDS通信正常,作为远程终端(RT)的1553B接口通信正常,输入输出接口隔离效果良好,通信正常。在此基础上,专用计算机通过了常压下12个循环的鉴定级热循环测试、基于国家军用标准GJB151A的电磁兼容测试和累计1014个小时的长期开机测试。
[Abstract]:In this paper, the research of special computer against complex environment is carried out under the request of research task. The system design, software and hardware realization, system test are completed, and various environmental experiments are carried out. The main frequency of the special computer is as high as 200MHz, and it has strong computing ability. The host computer is composed of two TI-DSP C6747 chips. With the help of the FPGA chip, the state of the DSP chip is detected and the working state is switched. In this paper, a fast switching temperature backup technology based on DSP chip is proposed and implemented, which ensures that the special computer can operate the external interface continuously and seamlessly. The test results show that the maximum switching time of the chip is 6.1 渭 s. Each DSP chip of this special computer system is mounted with 16MN 32bit SDRAM as program memory. Under the control of FPGA chip, the FPGA chip is loaded from NAND FLASH, and the 8Gbit FLASH space can be operated in 512kbit EEPROM space. At the same time, under the monitoring of FPGA, the FPGA chip can operate two LVDS interfaces with 720Mbps rate, and a 1553B interface with double channel redundant backup, which has 5 switch input interfaces of kHz magnitude and 5 sequential output interfaces with kHz order of magnitude. At the same time, as a means of state self-testing, a real-time clock RTC chip can be operated, and the temperature on the current board can be read by the temperature sensor chip on the two boards. After the electrical system functional coverage test, the special computer works at 200MHz main frequency, the memory function is normal, the real time clock is normal, the temperature sensor can complete the fast switch, and the LVDS communication at 720Mbps is normal. As a remote terminal (RTT), the 1553B interface communicates normally, the I / O interface is isolated well and the communication is normal. On the basis of this, the special computer has passed 12 appraisal stage thermal cycle tests under atmospheric pressure, electromagnetic compatibility test based on national military standard GJB151A and long-term start-up test of 1014 hours cumulative.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.3

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