E. Rogers

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SUMMARY Discrete linear repetitive processes are a distinct class of 2D linear systems with applications in areas ranging from long-wall coal cutting through to iterative learning control schemes. The main feature which makes them distinct from other classes of 2D linear systems is that information propagation in one of the two independent directions only(More)
We consider the iterative learning control problem from an adaptive control viewpoint. It is shown that some standard Lyapunov adaptive designs can be modiied in a straightforward manner to give a solution to either the feedback or feedforward ILC problem. Some of the common assumptions of nonlinear iterative learning control are relaxed: eg. we relax the(More)
  • E. Rogers
  • 1995
The work described in this article presents an approach to the integration of computer-displayed radiological images with cooperative computerized assistance for decision-making. The VIA-RAD system (Visual Interaction Assistant for Radiology) is a blackboard-based architecture, founded on extensive data collection and analysis in the domain of diagnostic(More)
We consider nonlinear systems in an output feedback form which are functionally known up to a L 2 measure of uncertainty. The control task is to drive the output of the system to some neighbourhood of the origin. A modiied L 2 measure of transient performance (penalising both state and control eeort) is given, and the performance of a class of model based(More)
Iterative learning control has the potential to significantly improve the tracking performance of repeating trajectory control systems. However, until now little attempt has been made to measure this performance quantitatively. A new iterative learning control performance index PI<sub>N</sub> is introduced which allows direct, quantitative, performance(More)
In this paper the development of a SCILAB compatible software package for the analysis and control of repetitive processes is described. The core of the package consists of a simulation tool which enables the user to inspect the process dynamics with or without control laws applied. Reliable and numerically efficient algorithms for stability analysis and(More)
Repetitive processes are a distinct class of two-dimensional (2D) systems (i.e. information propagation in two independent directions occurs) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D here) or (most often) 2D systems theory. In this paper we(More)
Differential repetitive processes are a class of continuous-discrete 2D linear systems of both systems theoretic and applications interest. The feature which makes them distinct from other classes of such systems is the fact that information propagation in one of the two independent directions only occurs over a finite interval. Applications areas include(More)