Digital Cockpit Fault Tolerant Control Panel System Based On ARINC825

With the rapid development of avionics technology, the complexity of thecontrol system and the number of digital instruments significant increases. Thedevelopment of avionics system is gradually dominated by modular, integratedcircuit miniaturization and high-performance data processing and display. So lowperformance digital bus is obviously not conducive to the expansion or upgrading ofavionics system; in addition, the method of merely improving the quality andprocess of electronic components is also unable to meet the reliability requirements.Therefore, High-speed, reliable digital bus technology and advanced fault tolerantcontrol are more and more important for enhancing the overall performance of thecockpit control system.Firstly, on the basis of analyzing the development trend of the avionics system,a novel scheme of the digital cockpit fault tolerant control system based onARINC825bus is designed for regional aircraft to remedy the defects of severaltypical digital bus such as ARINC429MIL-1553-B and AFDX, and disadvantages ofthe traditional control methods as well.Secondly, this paper puts forward the general structure of the cockpit controlsystem considering the physical environment and the design requirements of theregional aircraft. On the one hand, dual DSP junction with CPLD is proposed toensure the high-performance signal acquisition and processing capabilities forreal-time monitoring and observation; on the other hand, according to redundancydesign ideas, the core components of the system have been hot-backup, and activefault tolerant control method is used to eliminate the adverse effects of temporaryinterference.Thirdly, modular design method has been used and a novel network strategybased on the ARINC825bus is proposed to achieve a highly reliable data sharingbetween the various subsystems and modules to realize effective local monitoringand remote control of various types of electronic equipments.Finally, based on the system experimental platform, the functional tests havebeen launched to verify the effectiveness of the system demo, in accordance with theintended function and performance of the system. Various circumstances areincluded in these tests, especially several typical failure cases, and the test resultsare well presented.