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Inspection Of Space Station Cold Plate Using Visual And Automated Holographic Techniques
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721188208 Total Pages :38 pages Book Rating :4.1/5 (882 download)
Book Synopsis Inspection of Space Station Cold Plate Using Visual and Automated Holographic Techniques by : National Aeronautics and Space Administration (NASA)
Download or read book Inspection of Space Station Cold Plate Using Visual and Automated Holographic Techniques written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real-time holography has been used to confirm the presence of non-uniformity in the construction of an International Space Station cold plate. Ultrasonic C-scans have previously shown suspected areas of cooling fin disbonds. But both neural-net processed and visual holography did not evidence any progressive permanent changes resulting from 3000 pressurization and relaxation cycles of a Dash 8 cold plate. Neural-net and visual inspections were performed of characteristic patterns generated from electronic time-average holograms of the vibrating cold plate. Normal modes of vibration were excited at very low amplitudes for this purpose, The neural nets were trained to flag very small changes in the mode shapes as encoded in the characteristic patterns. Both the whole cold plate and a zoomed region were inspected. The inspections were conducted before, after, and during pressurization and relaxation cycles of the cold plate. A water-filled cold plate was pressurized to 120 psig (827 kPa) and relaxed for each cycle. Each cycle required 5 seconds. Both the artificial neural networks and the inspectors were unable to detect changes in the mode shapes of the relaxed cold plate. The cold plate was also inspected visually using real-time holography and double-exposure holography. Regions of non-uniformity correlating with the C-scans were apparent, but the interference patterns did not change after 3000 pressurization and relaxation cycles. These tests constituted the first practical application of a neural-net inspection technique developed originally with support from the Director's Discretionary Fund at the Glenn Research Center at Lewis Field. Decker, Arthur J. and Melis, Matthew E. and Weiland, Kenneth E. Glenn Research Center NASA/TM-1999-209388, NAS 1.15:209388, E-11816
Book Synopsis Inspection of Space Station Cold Plate Using Visual and Automated Holographic Techniques by : Arthur John Decker
Download or read book Inspection of Space Station Cold Plate Using Visual and Automated Holographic Techniques written by Arthur John Decker and published by . This book was released on 1999 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inspection of Space Station Cold Plate Using Visual and Automated Holographic Techniques by :
Download or read book Inspection of Space Station Cold Plate Using Visual and Automated Holographic Techniques written by and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Metrology for Fluids, Combustion and Solids by : Carolyn Mercer
Download or read book Optical Metrology for Fluids, Combustion and Solids written by Carolyn Mercer and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Metrology for Fluids, Combustion and Solids is the first practical handbook that presents the assemblage of the techniques necessary to provide a basic understanding of optical measurement for fluids, combustion, and solids. The use of light as a measurement tool has grown over the past twenty years from a narrowly specialized activity to a mainstay of modern research today. Until recently, the knowledge that could be extracted from the light interaction of light with physical objects was limited to specialized activities. The invention of the laser, the computer and microelectronics has enabled a measurement revolution such that virtually every parameter of engineering interest can be measured using the minimally intrusive properties of light. The authors of this book's chapters are leaders in this revolution. They work on the front lines of research in government, industry, and universities, inventing yet more ways to harness the power of light for the generation of knowledge.
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Book Synopsis Damage Detection Using Holography and Interferometry by : Arthur J. Decker
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Book Synopsis Neural-Net Processed Characteristic Patterns for Measurement of Structural Integrity of Pressure Cycled Components by :
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Book Synopsis Neural-Net Processed Electronic Holography for Rotating Machines by :
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Book Synopsis Comparative Evaluation of Two Attachment Techniques for Space Station Cold Plates by : G.P. Peterson
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Book Synopsis Scientific and Technical Aerospace Reports by :
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Book Synopsis Materials and Processes by : Barrie D. Dunn
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Book Synopsis Holographic Nondestructive Testing by : Robert K. Erf
Download or read book Holographic Nondestructive Testing written by Robert K. Erf and published by . This book was released on 1974 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: TEXTBOOK. CHAPTERS INCLUDE: INTRODUCTION BY R.K. ERF; HOLOGRAPHY BY J.P. WATERS; PULSED HOLOGRAPHY BY R.M. GAGOSZ; INTERFEROMETRIC HOLOGRAPHY BY J.P. WATERS; HOLOGRAPHIC AND MOIRE SURFACE CONTOURING BY J.R. VARNER; HOLOGRAPHIC CORRELATION BY E. MAROM; HOLOGRAPHIC VIBRATION ANALYSIS BY K.A. STETSON; SPECIALIZED HOLOGRAPHIC TECHNIQUES AND APPLICATIONS (SECTIONS ON OBJECT MOTION COMPENSATION IN CW HOLOGRAPHY; TEMPORAL MODULATION TECHNIQUES, USE OF CONTOUR MAPS FOR MEASURING SURFACE DISPLACEMENT; STRAIN MEASUREMENT; CRACK DETECTION; LAMINATE STRUCTURE INSPECTION; COMPOSITE MATERIALS INSPECTION; CYLINDRICAL BORE INSPECTION; TURBINE BLADE INSPECTION; PNEUMATIC TIRE INSPECTION, SOLID PROPELLANT ROCKET INSPECTION); MICROWAVE HOLOGRAPHY; ACOUSTICAL HOLOGRAPHY WITH SCANNED HOLOGRAM SYSTEMS. EACH CHAPTER HAS REFERENCES.
