多分辨小波控制器在轧辊偏心控制中的应用

Application of multi-resolution wavelet controller in roll eccentricity control

提出了一种用于轧辊偏心控制的多分辨小波控制器，它利用小波对轧制力信号进行多分辨分解．机架的轧制力中包含着许多潜在因素的累积影响，比如压下环节的动特性、轧辊偏心、测量噪声、外部干扰等，这些影响体现在不同的尺度上．通过小波的多分辨分解，这些不同尺度上的信息被区分开来，然后在控制中对轧辊偏心进行补偿．仿真实验表明该方法是有效的．

A novel multi-resolution wavelet controller used in roll eccentricity control was presented. The control strategy was based on multi-resolution decomposition of roll force signal by use of wavelets. The roll force from a stand represented the cumulative effect of many underlying phenomena such as process dynamics, roll eccentricity, measured noise, effects of external disturbances etc., which manifest on different scales. The wavelet decomposition, which represented the roll force signal at different scales, was compensated for the roll eccentricity signal and removed other uncertainties in control design. Simulated results were shown to validate the control strategy.