Analysis Of Rotating Structures Using Image Denotation With Multiple-Pulsed Lasers And Moire Techniques

MacBain, J. C.; Stange, William A.; Harding, Kevin G.

doi:10.1117/12.7972932

Cited by 7 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resonance response of a disk with asymmetrically distributed inertia depends upon the excitation frequency and the difference between the split mode natural frequencies [13,17,18]. These papers are highly recommended for their experimental results.…”

Section: Circular Saw Vibrationmentioning

confidence: 99%

The Shock and Vibration Digest. Volume 17. Number 5

Nagle-Eshleman¹

1985

View full text Add to dashboard Cite

MANY THANKSOn behalf of the Shock and Vibration Information Center I wish to publicly thank the many members of the shock and vibration technical community for their help in reviewing the papers to be published in the 5 5th Shock and Vibration Bulletin. We appreciate the time you took from your busy schedule to help us, but I am sure the authors appreciate your suggestions for improving their papers even more. Again, many thanks for your help. .--v- EDITORS RATTLE SPACE DOCUMENTATION OF EXPERIMENTAL WORKThe DIGEST Literature Review section has always suffered from a lack of papers on experimental work. It appears that this trend reflects the state of the literature in the shock and vibration field. In general, experimentalists have not been as prolific in paper and book publishing as analysts and theoreticians. The nature of the work performed and the end use of it have contributed to this situation. In addition, publication prejudice has precluded the documentation of much good experimental work. It is unfortunate that each year test work goes undocumented -leaving the wheel to be reinvented.One of the reasons that experimental work often goes undocumented is that it is of service nature. The testing and experiments are conducted in the process of developing hardware or diagnosing problems. While this work may not be the focal point of the research and development, it is important to the success of the program whereas mathematically oriented work often is the final product within itself. In many cases test work may not appear to be original and/or innovative; however, many new techniques are developed to do routine work. These techniques may or may not be documented. Normally the test data will be documented in a report which usually is not available to the public. Seldom is it published in the open literature ~ because there isn't time or it is deemed unnecessary. These techniques and data would be valuable to future researchers if they were documented in a concise and organized manner.The publication process is by no means easy for test engineers and technicians. Except for periodicals like the Shock and Vibration Bulletin journals are not interestea in experimentally oriented papers. These papers are filtered out in the review or editorial process because only mathematical papers are viewed as genuine contributions to the literature. Thus there is a need for better balance in the publication process.Somehow the situation on the publication of experimentally oriented literature must be changed so this important technology appears in print. Perhaps the new MIL STD 810 will motivate the process and result in the development of much test technology. Hopefully a mechanism will be developed to get this work documented -with procedures and data formats. The pad is subjected to a vibrating focce. A mathematical model is used to evaluate stiffness and damping coefficients for the rubber and the damped enetgf.A heat conduction equation describing the temperature field in the rubber specimen is formulated; analytical ...

show abstract

Section: Circular Saw Vibrationmentioning

confidence: 99%

The Shock and Vibration Digest. Volume 17. Number 5

Nagle-Eshleman¹

1985

View full text Add to dashboard Cite

show abstract

“…One such application reported in an earlier paper was the use of structured light, particularly moire contouring methods, to measure the deflection of a rotating disk as an aid in turbine dynamics study. 2,3 This work used a projected straight line pattern. However, as the part image needed to be derotated (or pulsed) in order to see the stationary vibration mode pattern, this presented a challenge for a moire method.…”

Section: Introductionmentioning

confidence: 99%

3D measurement using circular gratings

Harding

2013

SPIE Proceedings

View full text Add to dashboard Cite

3D measurement using methods of structured light are well known in the industry. Most such systems use some variation of straight lines, either as simple lines or with some form of encoding. This geometry assumes the lines will be projected from one side and viewed from another to generate the profile information. But what about applications where a wide triangulation angle may not be practical, particularly at longer standoff distances. This paper explores the use of circular grating patterns projected from a center point to achieve 3D information. Originally suggested by John Caulfield around 1990, the method had some interesting potential, particularly if combined with alternate means of measurement from traditional triangulation including depth from focus methods. The possible advantages of a central reference point in the projected pattern may offer some different capabilities not as easily attained with a linear grating pattern. This paper will explore the pros and cons of the method and present some examples of possible applications.

show abstract

“…Yu 1 has visualized the nodal diameters of a stationary disk with a stroboscope. MacBain et al 2,3 have used holographic interferometry and moiré techniques to identify the nodal diameters of a rotating disk. However, these methods are essentially visual and cannot be used in a process to decrease the vibrations.…”

Section: Introductionmentioning

confidence: 99%