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When designing a mechanical product, how to determine its assembly tolerance specifications (ATS) and tolerance zone types (TZT) is a complex design problem, in which designers need to consider comprehensively the functional requirement, geometric feature, tolerance principle, and so on. Therefore, it has high requirements for designers. Meanwhile, the design and development of a complex assembly...
Fault diagnosis and abnormal event management are key issues in process industry. For decades of research, many approaches have been proposed and put into practice. The Signed Digraph (SDG) model based diagnosis approach seems to be more effective in tracing the root causes of abnormality in large scale process system like petrochemical industry, especially when system becomes more complex nowadays...
Modern process system can be regarded as multi-medium interacted heterogeneous networks comprised of material transportation, power supply and control information exchange, in which substance like material, energy and information coexist and interact. Thus fault diagnosis and safety analysis for complex process system based on homogeneous network theory should be improved to hold multi-medium interacted...
Causality diagram is one of the most effective theoretical models for uncertainty knowledge expression and reasoning. In order to realize the computer-aided construction of the causality diagram for diagnostics, this paper proposes a simple, yet comprehensive representation model to organize the failure knowledge more systematically and completely. This method defines the failure modes as the inherent...
Failure modes and effects analysis (FMEA) is a traditional safety analysis method that has a worldwide recognition across many industries. However, there are documented limitations to the technique, which make it difficult for direct conversion to the diagnosis models. This paper aims to contribute to the reuse of FMEA knowledge through a novel knowledge modeling approach. Taking the structure model...
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