Fuzzy Fault Tree Analysis as a Means for Computer Aided Technology Transfer to Small/Medium Anodizers

摘要

Computer aided technology transfer to Small/Medium Anodizers (SMAs) can be provided either by an Anodizing department of a Large Company (ALC) or by a Technology Center designed for this purpose. In this work, a full cycle of this process is presented, including mainly Diagnostic Knowledge Base (DKB) enrichment, fuzzy Fault Tree Analysis (FTA), application of a simple expert system for pre-filtering alternative solutions to the problem, and fuzzy multicriteria analysis (MCA), all performing on a quasi online/real-time basis. The utility/applicability of this computer aided integrated scheme was proved by successfully analysing a real industrial problem referring to the appearance of defected articles in aluminium anodizing when medium/ high thickness/porosity oxide layers were produced within a sulphuric acid bath.