The Research Of CFDS Data Analysis System Based On Network Technology

Centralized fault display system is not only the management center of working states of various airborne systems, but also an independent and comprehensive maintenance management system, which is used to understand the fault status of aircraft by maintenance crews, find out the sources of faults quickly and remove faults promptly. When LRU components are repaired in the in-field, the crews need to use specific equipments for reading faults in LRUs, which should have the CFDS function of reading LRU fault messages,however, because the kind of equipments are mainly imported and highly expensive, and remote fault maintenance is not supported by it, the above shortcomings make maintenance area vastly narrow. Therefore, it is meaningful significantly for breaking foreign monopoly and enhancing the competitiveness of China's aircraft maintenance to develop the equipment,which has the function of reading remote LRU fault messages.First,the article elaborates the status of researching on the subject in the domestic and foreign countries, then analyses the data transferring characteristics and electrical requirement of ARINC429 protocol. And on this basis, ARINC429 data information is determined in the specific LRUs by inspecting the relevant CMM and AMM manuals. Finally, network programming, interface and database design are accomplished in VC++6.0 development environment, the remote fault reading system which accords with ARINC429 transfer protocol and has sections of CFDS function is designed.The system can not only read remote faults, but also make user interface more friendly,and add a variety of operator misuse tips. In addition, it is effective to explore the key technology research of the whole complex CFDS system, providing certain technology support for the avionic systems of large aircrafts made by our country.