Optical cross-channel data link (OCCDL) is an important part for data exchange among the fly-by-light redundancy flight control computers. In order to improve the reliability of OCCDL system, a new OCCDL system with multi-link fault tolerant capability is designed. The structure of the OCCDL is given and the workflows of the OCCDL system under the conditions of normal operation and fault operation are analyzed. The fault-tolerant logical algorithms of its main component parts such as optical switch and optical link are designed. A Markov chain-based stability model of OCCDL system is established, and the fault probability calculations of optical link, optical switch, field programmable gate array(FPGA) and double-ports random access memory(RAM) are analyzed. The numerical simulation results show that the reliability and stability of OCCDL system are significantly improved. Moreover, the OCCDL system has the traits of real-time and practicality.
WANG Xinhua, ZHEN Ziyang, GONG Huajun, YANG Yidong
. Reliability of a Fault Tolerant Optical Cross-channel Data Link[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(8)
: 1524
-1530
.
DOI: CNKI:11-1929/V.20110328.1427.004
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