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针对快速傅里叶变换(FFT)算法在轧辊偏心控制中存在的缺点,提出了基于比值校正法的轧辊偏心补偿控制方法。首先利用比值校正法对FFT算法得到的频率、幅值、相角参数进行校正以提高参数精度,由校正后的参数重构偏心模型,然后将模型运用于偏心补偿控制。仿真及实验结果表明,利用校正参数重构得到的轧辊偏心模型可以很大程度减小轧件厚度波动,补偿效果优于传统FFT法。
Aiming at the shortcomings of Fast Fourier Transform (FFT) algorithm in roll eccentricity control, a roll eccentricity compensation control method based on ratio correction method is proposed. Firstly, the method of ratio correction is used to correct the frequency, amplitude and phase angle parameters obtained by the FFT algorithm to improve the parameter accuracy. The eccentric model is reconstructed from the corrected parameters, and then the model is applied to the eccentric compensation control. The simulation and experimental results show that the roll eccentricity model obtained by using the calibration parameters can greatly reduce the rolling thickness fluctuation, and the compensation effect is superior to the traditional FFT method.