Dynamic digital tracking filter

Details Dynamic digital tracking filter Dynamic digital tracking filter

1995-02-10

1995-08-29

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73660, G01H 108, G01M 1302, G01N 2900

Patent

active

054450284

ABSTRACT:
A system for measuring the magnitude component corresponding to the once-per-revolution frequency or a multiple thereof of the vibration signal generated by a body rotating at a non-uniform rate. The output of a sensor detecting the acceleration of the vibration motion of the rotating body is decomposed into its frequency components. Simultaneously, the information contained in the output of a tachometer sensor for detecting the rotational speed of the rotating body is used to determine the variation of the rotational speed during the measurement interval. The speed variation information is selectively combined with the frequency components of the acceleration spectrum to yield the magnitude result that would be measured if the rotating body had a constant rotational speed. This method yields vibration information in select frequency bands that is corrected for the non-uniform rate of rotation of the body.

REFERENCES:
patent: 4196629 (1980-04-01), Philips
patent: 4377947 (1983-03-01), Matsushita et al.
patent: 5263372 (1993-11-01), Matsuzaki et al.

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