Optimal mixed H2/H∞ controller design for vibration suppression in a class of image transfer belt

An optimal controller architecture design based on mixed H2/H∞ norm is presented for the rejection of printing medium loading disturbance in a class of image transfer belt modelled as a four-rollers-belt system. By selecting the feedback information purposely, the proposed H2/H∞ controller acts in all variables concerning quality of the original image formation. With the comparison of the conventional PID speed control design, it is shown that the image transfer belt system is successfully maintained in the satisfying condition.