Quality control by spectral analysis
by H. Strelec
International Journal of Materials and Product Technology (IJMPT), Vol. 3, No. 1, 1988

Abstract: The construction of an inspection procedure for devices which are working under mechanical stress is discussed. The underlying model assumes that vibration under a certain form of stress is nearly constant with a continuous spectrum. The observation of vibration at specified times leads to estimates of the spectral density functions. Two characteristic deviations between the estimated and the expected form of the spectral density function are discussed which are the basis of a couple of quality control charts. On the one hand, some measure for a global difference between these functions (e.g. integrated squared differences) and, on the other hand, some measure for the greatest difference have to be used. For special measures concrete statistical inference is possible.

Online publication date: Sat, 06-Nov-2010

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