Balancing method and apparatus

Details Balancing method and apparatus Balancing method and apparatus

1975-11-26

1977-04-05

Gill, James J.

Measuring and testing

Rotor unbalance

Dynamic

2351513, G01M 122

Patent

active

040154807

ABSTRACT:
The present balancing method measures instantaneous analog unbalance representing signals and converts these signals into digital signals. The conversion involves multiplying the measured signals with reference values at least three times within each period of a reference signal. Said reference values are sine or cosine values of an oscillation having the same frequency as the unbalance vibration. The sine and cosine reference values are taken at points of time corresponding to the respective multiplication point of time. The products of all individual multiplications are separately summed for sine and cosine values and at least for one period of the reference signal. Thereafter mean values are formed from the two sums. The just mentioned signal processing steps are performed by digital circuits including digital multipliers, digital summing networks, digital mean value formation circuits, as well as a clock signal generator.

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