Research on active disturbance rejection control of fast tool positioning table based on piezoelectric drive
Aiming at the dynamic hysteresis characteristics of input voltage and output displacement of piezoelectric drivers,a piezoelectric dynamic hysteresis model based on Prandtl-Ishlinskii is used,for precise control of the tool positioning table.The results show that under the single-frequency input signal,the root mean square error of the system using the active disturbance rejection control algorithm is 1.137～1.137 5 μm lower than that of the inverse model feedforward control.The relative error of the system has decreased significantly.The results show that the active disturbance rejection control successfully reduces the hysteresis characteristics of the positioning station,improves the control accuracy,and has better advantages than the inverse model feed-forward compensation compensation control.
fast tool positioning platformPrandtl-Ishlinskii modeltracking controlhysteresis inverse modeldisturbance rejection control
万方数据
维普
