Szukana fraza: [Abstract = "This paper develops a novel framework for iterative learning control \(ILC\) design of discrete\-time systems with non\-uniform trial lengths by using alternating projections. In contrast to existing works for the non\-uniform trial length problem, this paper uses the Hilbert space settings and hence the discrete\-time system dynamics with non\-uniform trial lengths can be represented by multiple affine subspaces \(or linear varieties\)."]