A Novel Balancing Method of the Rotor System Using Load Identification and FIR Filter-Based Force Estimation Technique

The classical balancing technologies are easily limited by the condition of the rotational speeds and test runs with trail weights. To solve these problems, a novel balancing technology for identifying the unbalance parameters of the rotor system is proposed in this chapter. The Transfer Matrix Method (TMM) is introduced to obtain the dynamical equations of rotor system. Through load identification and FIR filter techniques, the input excitation forces of the rotor system are preliminarily calculated by the load identification technique, while the vibration responses are regarded as output. After that, the ultimate unbalance forces are estimated by FIR filter. The unbalance parameters are identified by analyzing the amplitudes and phases of the calculated excitation forces. The accuracy of the proposed method is demonstrated by numerical simulations of double-disc rotor system. The results obtained prove that the proposed method does not require test runs with trail weights, and the proposed method is suitable for balancing without the limitation of the rotational speed conditions.