Resumen de Design of heartbeat invalidation detecting mechanism in triple modular redundancy multi‐machine system
Jian-xiao Zou, Zheng-qian Zhang, Hong-bing Xung
Purpose – According to the high‐reliability requirement and especial structure of triple modular redundancy (TMR) emergent trip multi‐machine system, the purpose of this paper is to introduce a highly effective invalidation detecting mechanism based on heartbeat mechanism.
Design/methodology/approach – The structure of TMR system is designed to be multi‐master and multi‐save. According to the multi‐machine environment, an invalidation detecting mechanism is designed. Considering the advantage and weakness of the traditional PULL and PUSH heartbeat model, the mechanism combines PUSH model with PULL model. To further enhance real‐time ability and reliability of the invalidation detecting mechanism, hierarchy heartbeat monitor and integrating the heartbeat message into data transmission are designed in the mechanism.
Findings – The invalidation detecting mechanism combines PUSH with PULL heartbeat monitor model can enhance reliability and decrease the system misdiagnosis rate greatly. By adapting hierarchy heartbeat mechanism and integrating the heartbeat detecting message into the data transmission, the system communication cost is decreased and the input‐to‐output response time is shortened. The effectiveness and reliability of this mechanism are proved by system field commissioning and MATLAB simulation.
Originality/value – Using a new heartbeat invalidation detecting mechanism, this paper provides a new way of fault diagnosis of TMR multi‐machine system.
