| 摘要 |
<p>The invention relates to an imaging system for processing a media, comprising a media transport path, an imaging station arranged along said media transport path, displacement means for controllably displacing the media along the media transport path relative to said imaging station and a controller assembly, the controller assembly comprising a feedback filter, a feedforward filter, a low-pass filter and a memory for storing and time delayed releasing control data, where in operation the displacement means are actuated in response to an actuation command generated by the controller assembly, the actuation command having a feedback component based on a filtering by the feedback filter of an error signal comprising information about the position error between a desired position and the actual position of the media and a feedforward component based on a time delayed, low-pass filtered, frequency dependent filtering of the error signal by the feedforward filter, the feedforward filter being devised such that the closed-loop controlled characteristics of the displacement means are compensated.</p> |
