An Identification Method for Axial Unbalance of GyroWheel Rotor Based on Multi-position Calibration

Aiming at the GyroWheel rotor with special support structure, this paper proposes a new method for identifying the rotor axial unbalance. Different from the traditional rotor which only has radial unbalance, the axial unbalance of GW rotor will affect the measurement accuracy and is difficult to identify. Based on the axial unbalance disturbance torque model, combined with the GW drift error model, the idea of identifying through the error coefficient is adopted. Using the multi-position calibration test, the coefficients D-x(x) and D-y(y) containing the axial unbalance information are estimated. Then, according to the influence coefficient method, the test weight is added to calculate the original unbalance. The simulation results verify the effectiveness of the proposed method, and the error between the estimated value and the actual value is 0.22% and 0.24%, respectively.