The Minimization Method of Measuring Errors for Balancing Asymmetrical Rotors

Abstract

The accuracy of rotor balancing is influenced by measuring errors essentially. The conventional influence coefficient method considering measurement errors is able to improve the balancing accuracy of symmetrical rotors. However, the balancing accuracy of asymmetrical rotors cannot be improved by using conventional method. Since asymmetrical rotors are axis-asymmetrical, the balancing result is affected by inequality of rotary inertia and bending rigidity. This study has presented a modified influence coefficient method for the determination of imbalance with the consideration of measurement errors based on the least-squares technique. The present method has derived theoretically and verified by the experiments of balancing a rotor kit.