Fault Diagnosis of the Twin-lift Hydraulic Hoist System Based on Fault Tree Analysis
Based on the Fault Tree Analysis(FTA),the fault tree of twin-lift hydraulic hoist system for gate is established by analyzing system failure form,system structure and the logical relationship between the parts and the system and taking the faults as the top event.The qualitative and quantitative analyses are carried out through computing the minimum cut sets and the importance.The results show that the fault is mainly caused by the wear of hydraulic components and the jamming of valve spool.The study can provide guidance to routine maintenance and repair.
We propose a framework for examining trust in the storage stack based on different levels of trustworthiness present across different channels of information flow. We focus on corruption in one of the channels, the data channel and as a case study, we apply type-aware corruption techniques to examine Windows NTFS behavior when on-disk pointers are corrupted. We find that NTFS does not verify on-disk pointers thoroughly before using them and that even established error handling techniques like replication are often used ineffectively. Our study indicates the need to more carefully examine how trust is managed within modern file systems.