Abstract
The identification of unbalance is the crux of field balancing of dual rotors system with slightly different rotating speeds. On the basis of correlation theory, this paper explains a method called “Single Point Discrete Fourier Transformation (DFT)” to identify the unbalance. By theoretical analysis, the correlation integral time and its maximum possible error are determined. The field balancing experiment on WLZY-350 horizontal spiral centrifuge verifies its precision, reliability and applicability in practice.
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