船舶动力定位系统级故障诊断技术

针对松散耦合的船舶动力定位系统分布式体系结构，提出了一种基于改进的二值PMC模型约分布式系统级故障诊断算法。采用自诊断与互诊断相结合的方法，给出了分布式诊断算法、图论模型、诊断内容及算法中使用的报文种类、故障向量。基于软件故障注入思想设计了四种故障，并对该算法进行了诊断验证。结果表明：改进的PMC模型适用，所提出约分布式系统故障诊断算法正确，故障诊断与验证应用程序可靠、实用。

Research of System-level Fault Diagnosis Technique in Ship Dynamic Positioning System

For the loosely coupling distributed structure of ship dynamic positioning system, a new distributed system level fault diagnosis algorithm based on adaptive PMC model is proposed. This paper adopts the method that unites self diagnosis and interactive diagnosis, and presents the system graph theoretic model, diagnosis contents, some tokens and fault vectors. Finally, the paper illustrates the procedure of diagnosis verification by setting some faults based on the fault injection idea. The results show that the adaptive PMC model is applicable, the distributed system level diagnosis algorithm is proper, and the applications of diagnosis and verification are reliable and practicable.