Research on the Computer Synchronization of the Fault-Tolerant System

With the development of the control system, computers are applied more and more in it. The application of the quad-redundancy (similarity redundancy) computer is more extensive, in the time tightly-coupled control system, the synchronization among computers (namely channels) is the key to successful control. Synchronization is to narrow the time differences caused by errors in hardware among channels within the range of system requirements, which makes each channel achieve time consistency. Through the in-depth analysis and research of the system and computer, the corresponding synchronous supporting interface circuit is designed as the foundation of software synchronization, which ultimately completes the synchronization. The method of realizing synchronization adopts “single-handshake” and “twi-handshake”. Finally, through the experiment verification, it is determined that the system adopts the “twi-handshake” synchronization method as the synchronization strategy of the quadruplex-redundancy computer. The method has been fully verified in subsequent system test experiments, and has met the expected design requirements. The “twi-handshake” synchronization method, as a synchronized method among computers, can be applied to a wider range of systems.