Fault-tolerant Software Based On Similar Real-time Operating System And Synchronization Issues

With the increase of the Aeroengine performance, the control system becomes more and more complex, so Full Authority Digital Electronic Control (FADEC) ,as the center of the system, it's design of reliability is more and more important. After researching the theory and methods of software reliability, the thesis re-designs the traditional FADEC software system, and sets up the system of Dual Fault-Tolerant Embedded FADEC experiment system. The paper sets up the fault-tolerant dual computer system consisted of software layer based on dissimilarity redundancy technique and hardware layer based on similarity redundancy technique. Through the theory and experiment, the thesis demonstrates that this system can be applied to the practical engineering definitely.The thesis desgins the software system of the Fault-Tolerant Computer, and discuss the technology of the Redundancy Management, then designs and analyzes some parts of the management. Because of the structure of two modules, the synchronization of the two modules is important. The thesis research the synchronization of the redundancy management, and make sure the synchronization arithmetic of this system.