A multilevel modular control architecture for image reproduction

This paper presents a specific modular control architecture for an 'electrophotographic' type printing technology. First, a detailed survey of various printing technologies is discussed. Then we address the following key issues: 1) controlling a printing system; 2) the tone reproduction curve; and 3) a specific multilevel modular control architecture that the authors have successfully designed, developed and tested on bench fixtures. Results from applying the discrete linear state feedback control theory to stabilize the multivariable loops are discussed. Finally, we conclude with what was learned while implementing a complex multivariable control system in an industrial environment.