本文選題：航空電子 + 光纖通道�。� 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：軟硬件技術(shù)的飛速發(fā)展和進(jìn)步,以及微電子技術(shù)的革新等,總線技術(shù)的發(fā)展也迫在眉睫。MIL-STD-1553B是美國上個(gè)世紀(jì)提出的軍用總線標(biāo)準(zhǔn),用于機(jī)載電子設(shè)備間的通信,但是隨著網(wǎng)絡(luò)技術(shù)的進(jìn)步在很多方面它已經(jīng)不能滿足現(xiàn)在的通信要求。在此背景下提出的FC-AE-1553協(xié)議對其做了繼承和發(fā)展,使得航電系統(tǒng)總線的性能大幅提高。FC-AE-1553協(xié)議是由光纖通道(Fibre Channel)標(biāo)準(zhǔn)組織航空電子分委員會(huì)制定。它定義了MIL-STD-1553B總線協(xié)議到光纖通道高層協(xié)議的映射,實(shí)現(xiàn)了對MIL-STD-1553B總線的平滑升級,在保證對傳統(tǒng)MIL-STD-1553B總線設(shè)備兼容的同時(shí)又具備了FC總線的高傳輸帶寬、低延時(shí)和低誤碼率等特點(diǎn)。航天系統(tǒng)由于其處于特殊的空間環(huán)境的封閉性,高輻射干擾等特點(diǎn),對于與系統(tǒng)的影響,所以保證通信系統(tǒng)數(shù)據(jù)的準(zhǔn)確性、可靠性很必要。對沒有差錯(cuò)控制的FC-AE-1553總線做鏈路層的選擇性重傳可以更加降低原本就不高的誤碼率。由于軟硬件發(fā)展的歷史原因,航天系統(tǒng)中保留了不少基于MIL-STD-1553B總線的設(shè)備,所以對原有系統(tǒng)的兼容也是本文研究的不可或缺的一部分。本文先對FC協(xié)議以及MIL-STD-1553B總線協(xié)議的做了簡單介紹,分析和研究了FC-AE-1553的幀結(jié)構(gòu),和數(shù)據(jù)交換方式,重點(diǎn)研究FC-AE-1553的協(xié)議內(nèi)容以及FC-AE-1553網(wǎng)絡(luò)與MIL-STD-1553B網(wǎng)絡(luò)橋接的實(shí)現(xiàn)。在分析完以上協(xié)議后提出FC-AE-1553節(jié)點(diǎn)和橋的硬件部分實(shí)現(xiàn)方案,并與軟件一起完成節(jié)點(diǎn)(NC/NT)、FC-AE-1553與MIL-STD-1553B橋接功能實(shí)現(xiàn)方案。整個(gè)方案分為軟件,FPGA邏輯和硬件外圍接口兩部分組成。在此此方案實(shí)現(xiàn)的基礎(chǔ)上做基于硬件實(shí)現(xiàn)的差錯(cuò)控制的技術(shù)研究,選擇了一種資源占用相對較少與性能相對較好的選擇性自動(dòng)請求重傳技術(shù)。在實(shí)現(xiàn)了的NT與NC以及FC-AE-1553橋的功能后,以直連的方式組網(wǎng),驗(yàn)證NC、NT節(jié)點(diǎn)在各種數(shù)據(jù)交互模式下的功能和性能。通過仿真平臺驗(yàn)證橋接模塊對MIL-STD-1553B設(shè)備的橋接功能。通過故障注入卡加入CRC錯(cuò)誤的方法檢測節(jié)點(diǎn)的硬件重傳功能,以及加入重傳后對原有網(wǎng)絡(luò)性能的影響等。
[Abstract]:With the rapid development and progress of software and hardware technology and the innovation of microelectronic technology, the development of bus technology is also imminent. MIL-STD-1553B is a military bus standard put forward by the United States in the last century, which is used for communication between airborne electronic devices. However, with the progress of network technology, it can not meet the current communication requirements in many ways. In this context, the proposed FC-AE-1553 protocol inherits and develops it, which makes the performance of avionics system bus greatly improved. FC-AE-1553 protocol was formulated by the avionics subcommittee, which is the standard organization of fiber channel. It defines the mapping of MIL-STD-1553B bus protocol to fiber channel protocol, and realizes the smooth upgrade of MIL-STD-1553B bus. It not only ensures compatibility with traditional MIL-STD-1553B bus devices, but also has the characteristics of high transmission bandwidth, low delay and low bit error rate of FC bus. Because the space system is in the special space environment, it is necessary to ensure the accuracy and reliability of the data of the communication system because of its characteristics such as closure, high radiation interference and so on. The link layer selective retransmission of FC-AE-1553 bus without error control can reduce the low bit error rate (BER). Because of the development of software and hardware, many equipments based on MIL-STD-1553B bus are retained in the space system, so the compatibility of the original system is an indispensable part of this paper. In this paper, the FC protocol and the MIL-STD-1553B bus protocol are introduced briefly, the frame structure of FC-AE-1553 and the data exchange mode are analyzed and studied, and the content of FC-AE-1553 protocol and the implementation of bridge between FC-AE-1553 network and MIL-STD-1553B network are emphatically studied. After analyzing the above protocols, the hardware implementation scheme of FC-AE-1553 node and bridge is put forward, and the bridge function of FC-AE-1553 / NTE / FC-AE-1553 and MIL-STD-1553B is implemented together with the software. The whole scheme is composed of FPGA logic and hardware peripheral interface. Based on the implementation of this scheme, the hardware based error control technology is studied, and a selective automatic request retransmission technique with relatively less resource consumption and better performance is selected. After the functions of NT, NC and FC-AE-1553 bridge are realized, the function and performance of NCNT nodes in various data interaction modes are verified by direct connection. The bridging function of bridge module to MIL-STD-1553B equipment is verified by simulation platform. The hardware retransmission function of the node is detected by adding CRC error into the fault injection card, and the influence on the performance of the original network after adding the retransmission is also detected.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：V443;TN929.11

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本文編號：1851731