Method of determining damping of an article of manufacture...

Details Method of determining damping of an article of manufacture... Method of determining damping of an article of manufacture...

2006-07-03

2008-11-04

Williams, Hezron E. (Department: 2856)

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

C073S657000

Reexamination Certificate

active

07444874

ABSTRACT:
A method of determining damping performance of an article of manufacture includes moving an article of manufacture along a production line, directing a laser beam at a surface of the moving article and then measuring the velocity of a reflection of the beam simultaneously with measuring vibrational excitation in an environment of the production line. The method then includes calculating the damping performance of the moving article of manufacture based on the velocity and vibrational excitation measurements. The calculated damping performance may also be based on a predetermined correlation factor of damping performance of a reference article calculated based on the online system compared with damping performance of the reference article calculated in a controlled offline environment. A system for determining damping performance online is also provided.

REFERENCES:
patent: 5144838 (1992-09-01), Tsuboi
patent: 5520052 (1996-05-01), Pechersky
patent: 5533399 (1996-07-01), Gibson et al.
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patent: 6085593 (2000-07-01), Pileri et al.
patent: 6532818 (2003-03-01), Blankenship
patent: 6843128 (2005-01-01), Chen et al.
Standard Test Method for Measuring Vibration-Damping Properties of Materials E 756-98, Annual Book of ASTM Standards, Nov. 1998, American Society for Testing and Materials, West Conshohoken, PA.

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