| The aircraft-borne test system is used to collect data of flight and its subsystem, and convert these data to direct observation of value. Then storage, analysis, processing and telemetry of these flight data. The structure of large aircraft is complex,and its subsystem is numerous, large amount parameters are need to collected when test fly. PCM-based aircraft-borne test system mostly uses R422transport protocol, whose system flexibility is bad, data transmission speed and the transmitting range are limited. This type of aircraft-borne cannot meet the test of large aircraft needs. EtherCAT is a real-time industry Ethernet technology, has broken the tradition of data transmission way storage-forwarding, used receiving-forward means of communication, enhanced the real-time performance of Ethernet.EtherCAT-based airborne-aircraft test system can satisfy synchronization, reliability, real-time for large flight, is the development trend of airborne networked test system..The primary focus of this article is to study the realization of WEB management and disposition of the clock board. The clock board is used to offer a accurate clock benchmarks for aircraft-borne gathering distribution throughout the aircraft, which can collect time of IEEE1588IRIG-B and GPS, ensure that all subsystems working in the uniform pace, Is the prerequisite for airborne test system to run properly. The clock board use Virtex-5FPGA as its hardware platform, use MontaVista Linux as its software platform. WEB-based management can easily monitor and configure the operation of the clock board. In the foundation of analysis the clock board function module, this article has mainly done four work. First, design WEB management page. Secondly, designing CGI module of embedded Boa server. Third, design Linux driver, offer interfaces for CGI to read and write clock board. Fourth, transplant Linux operating system. Finally completed the validation of test cases by building a test platform, achieve the desired design goal. |
PDF Full Text Request