Non-whole beat correlation method for the identification of an unbalance response of a dual-rotor system with a slight rotating speed difference

The efficient identification of the unbalanced responses in the inner and outer rotors from the beat vibration is the key step in the dynamic balancing of a dual-rotor system with a slight rotating speed difference. This paper proposes a non-whole beat correlation method to identify the unbalance responses whose integral time is shorter than the whole beat correlation method. The principle, algorithm and parameter selection of the proposed method is emphatically demonstrated in this paper. From the numerical simulation and balancing experiment conducted on horizontal decanter centrifuge, conclusions can be drawn that the proposed approach is feasible and practicable. This method makes important sense in developing the field balancing equipment based on portable Single Chip Microcomputer (SCMC) with low expense.

► A non-whole beat correlation method (NWBCM) with shorter integral time is proposed.
► The principle, algorithm and parameter selection of the NWBCM are discussed.
► Comparing with the WBCM, the NWBCM reduce the measurement time at least by 50%.
► The NWBCM has value in developing field balancing equipment with cheaper SCM.