This paper presents a new approach t o introducing closed loop control in a copier paperpath in order t o achieve robust, high-speed media handling. The basic idea exploits periodicity in the relative position of correctly fed sheets and their corresponding images. It is shown that the periodic behavior allows t o design polynomial position reference trajectories for sheets as a function of their initial position error. Only longitudinal positlon errors are considered. By measuring sheet positions and using closed loop control to track the reference trajectories, position errors can be successfully removed. In addition to the reference trajectories, the paper also offers a design strategy that minimizes the required paperpath length while satisfying given bounds on sheet velocities and accelerations. Two examples, each with different initial error bounds, illustrate the design algorithm.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.