Graduate Thesis Or Dissertation
 

Evaluation of failure diagnosis in conceptual design of mechanical systems

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/41687k96g

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  • A methodology for improving quality and reducing life cycle costs of mechanical systems is described. The principal concept is that a system can be designed, in the conceptual stages, to be easier to diagnose for failures. To perform this, functional decomposition and form to function mapping are utilized both as a model of design and to demonstrate the relation of diagnosis to design. Design guidelines from other disciplines of engineering and concurrent engineering principles are applied to enhance the concept. Of the elements of concurrent engineering, design for manufacturability affects the others the greatest. Design for manufacturability principles impact the size of field replaceable units and can improve the ease of failure diagnosis of a system. A number of hypothetical cases are introduced that illustrate the form to function mapping of mechanical systems. Equivalent systems are presented with varying degrees of diagnostic complexity. These systems are analyzed for their ease of diagnosis and an evaluation methodology is described. In addition, a system which is difficult to diagnose is redesigned for improved diagnosis without changing the form to function mapping. The area of design for diagnosis offers promise in improving system quality and reducing life cycle cost; however, further research in this area will be required.
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  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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