Control theory and applications for repetitive processes

Repetitive processes are a class of two-dimensional (2D) systems of both theoretical and practical interest. These processes cannot be controlled by (direct) application of standard (termed 1D here) theory since such an approach neglects their unique dynamic characteristics. In this paper we present an introduction to repetitive processes and survey the work to-date on the development of a control theory for these processes and its application to, in particular, classes of iterative learning control schemes.