The gain scheduling control is widely used in the system, whose dynamics parameters change with the operating conditions. In order to adapt the dynamic parameter variety of the high-speed and flexible spindle, the gain scheduling control method is applied to control the unbalance vectors of the correcting faces. The algorithm principle of gain scheduling control and its control method are given in the paper. The flexible spindle experiment system is designed to test the dynamic balance effect of gain scheduling control method. The experiment result indicates that the unbalance vectors of the correcting faces tend to be stable and close to the actual demand based on the gain scheduling control, and the residual unbalance vibration of the two monitoring points tend to be average and small.
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