An investigation into coordinate measuring machine task specific measurement uncertainty and automated conformance assessment of airfoil leading edge profiles

3439 28 20603 6 39932 document 20603 Lobato12EngD.pdf application/pdf 3aa423751d96f9750d9d13bf3b195c28 MD5 8691738 2012-06-20 10:25:29 http://etheses.bham.ac.uk//id/eprint/3439/1/Lobato12EngD.pdf 3439 1 1 application/pdf application/pdf en public

Lobato12EngD.pdf

http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20610 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20610 http://eprints.org/relation/hassmallThumbnailVersion http://etheses.bham.ac.uk/id/document/20610 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20611 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20611 http://eprints.org/relation/haspreviewThumbnailVersion http://etheses.bham.ac.uk/id/document/20611 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20612 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20612 http://eprints.org/relation/hasIndexCodesVersion http://etheses.bham.ac.uk/id/document/20612 20604 6 39935 document 20604 Lobato12EngDApx.pdf application/pdf 3b4bb00bc5dbbaa8fa08e1e6a4199734 MD5 4502798 2012-06-20 10:26:01 http://etheses.bham.ac.uk//id/eprint/3439/2/Lobato12EngDApx.pdf 3439 2 2 application/pdf application/pdf en public

Lobato12EngDApx.pdf

http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20608 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20608 http://eprints.org/relation/hassmallThumbnailVersion http://etheses.bham.ac.uk/id/document/20608 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20609 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20609 http://eprints.org/relation/haspreviewThumbnailVersion http://etheses.bham.ac.uk/id/document/20609 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20613 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20613 http://eprints.org/relation/hasIndexCodesVersion http://etheses.bham.ac.uk/id/document/20613 20605 4 39938 document 20605 Decl_IS_Lobato12EngD.pdf application/pdf 01248a5806171be1f0673099f65b60d1 MD5 211270 2012-06-20 10:26:54 http://etheses.bham.ac.uk//id/eprint/3439/3/Decl_IS_Lobato12EngD.pdf 3439 3 3 application/pdf application/pdf en staffonly

Decl_IS_Lobato12EngD.pdf

http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20606 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20606 http://eprints.org/relation/hassmallThumbnailVersion http://etheses.bham.ac.uk/id/document/20606 http://eprints.org/relation/hasVolatileVersion http://etheses.bham.ac.uk/id/document/20607 http://eprints.org/relation/hasVersion http://etheses.bham.ac.uk/id/document/20607 http://eprints.org/relation/haspreviewThumbnailVersion http://etheses.bham.ac.uk/id/document/20607 20606 2 39949 document 20606 small.png image/png eebab39c18039ffc5a4d4da4907ddb4d MD5 10733 2012-06-20 10:49:35 http://etheses.bham.ac.uk//id/eprint/3439/4/small.png 3439 4 4 image/png thumbnail_small Thumbnail Documents conversion from application/pdf to thumbnail_small en staffonly

small.png

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/20605 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/20605 http://eprints.org/relation/issmallThumbnailVersionOf http://etheses.bham.ac.uk/id/document/20605 20607 2 39950 document 20607 preview.jpg image/jpeg b291e30aabb4c19910336f54c1964012 MD5 46172 2012-06-20 10:49:36 http://etheses.bham.ac.uk//id/eprint/3439/5/preview.jpg 3439 5 5 image/jpeg image/jpeg Thumbnail Documents conversion from application/pdf to thumbnail_preview en staffonly

preview.jpg

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/20605 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/20605 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/20605 20608 2 39951 document 20608 small.png image/png 062fbeb90318f539ab3a6d4e9a626b39 MD5 4926 2012-06-20 10:49:36 http://etheses.bham.ac.uk//id/eprint/3439/6/small.png 3439 6 6 image/png thumbnail_small Thumbnail Documents conversion from application/pdf to thumbnail_small en staffonly

small.png

preview.jpg

small.png

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/20603 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/20603 http://eprints.org/relation/issmallThumbnailVersionOf http://etheses.bham.ac.uk/id/document/20603 20611 2 39954 document 20611 preview.jpg image/jpeg 5fc26a0bce00a797b297263fa3ce94aa MD5 19497 2012-06-20 10:49:38 http://etheses.bham.ac.uk//id/eprint/3439/9/preview.jpg 3439 9 9 image/jpeg image/jpeg Thumbnail Documents conversion from application/pdf to thumbnail_preview en staffonly

preview.jpg

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/20603 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/20603 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/20603 20612 2 39955 document 20612 indexcodes.txt text/plain 5bba3a9ee73ba117cc9313fb994f19b8 MD5 26481 2012-06-20 10:49:40 http://etheses.bham.ac.uk//id/eprint/3439/10/indexcodes.txt 3439 10 10 text/plain indexcodes Generate index codes conversion from application/pdf to indexcodes en staffonly

indexcodes.txt

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/20603 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/20603 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/20603 20613 2 39956 document 20613 indexcodes.txt text/plain 5438286432fe9a2576727e1de4d6153f MD5 16975 2012-06-20 10:49:41 http://etheses.bham.ac.uk//id/eprint/3439/11/indexcodes.txt 3439 11 11 text/plain indexcodes Generate index codes conversion from application/pdf to indexcodes en staffonly

indexcodes.txt

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/20604 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/20604 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/20604 archive 4031 disk0/00/00/34/39 2012-06-20 15:44:50 2019-01-23 09:56:17 2012-06-20 15:44:50 thesis show 0 Lobato Hugo Manuael Pinto Bowen Paul Maropoulos Paul Orchard Nicholas University of Birmingham An investigation into coordinate measuring machine task specific measurement uncertainty and automated conformance assessment of airfoil leading edge profiles unpub QA76 TL TN TS 10col_ephy The growing demand for ever more greener aero engines has led to ever more challenging designs and higher quality products. An investigation into Coordinate Measuring Machine measurement uncertainty using physical measurements and virtual simulations revealed that there were several factors that can affect the measurement uncertainty of a specific task. Measurement uncertainty can be affected by temperature, form error and measurement strategy as well as Coordinate Measuring Machine specification. Furthermore the sensitivity of circular features size and position varied, when applying different substitute geometry algorithms was demonstrated. The Least Squares Circle algorithm was found to be more stable when compared with the Maximum Inscribed Circle and the Minimum Circumscribed Circle. In all experiments it was found that the standard deviation when applying Least Squares Circle was of smaller magnitude but similar trends when compared with Maximum Inscribed Circle and the Minimum Circumscribed Circle. A Virtual Coordinate Measuring Machine was evaluated by simulating physical measurement scenarios of different artefacts and different features. The results revealed good correlation between physical measurements uncertainty results and the virtual simulations. A novel methodology for the automated assessment of leading edge airfoil profiles was developed by extracting the curvature of airfoil leading edge, and the method lead to a patent where undesirable features such as flats or rapid changes in curvature could be identified and sentenced. A software package named Blade Inspect was developed in conjunction with Aachen (Fraunhoufer) University for the automated assessment and integrated with a shop floor execution system in a pre-production facility. The software used a curvature tolerancing method to sentence the leading edge profiles which aimed at removing the subjectivity associated with the manual vision inspection method. Initial trials in the pre-production facility showed that the software could sentence 200 profiles in 5 minutes successfully. This resulted in a significant improvement over the current manual visual inspection method which required 3 hours to assess the same number of leading edge profiles. 2012-07 2011-08 graduation eng author unchecked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. Rolls-Royce public 274 University of Birmingham School of Metallurgy and Materials d_en epsrc 2012-07 graduation