Summary: Accepted for publication at FRONTIERS IN INDUSTRIAL PROCESS TOMOGRAPHY II.
Engineering Foundation conference, Delft, The Netherlands, April 1997.
Do we Need Tomography for Process Control?
Lars Oest
Technische Informatik I, Technische Universit¨at Hamburg­Harburg,
Harburger Schloßstr. 20, D­21079 Hamburg, Germany
Tel: +49­40­7718­2277, Fax: +49­40­7718­2911
Email: oest@tu­harburg.d400.de
Hans Burkhardt
Institut f¨ur Informatik, Lehrstuhl f¨ur Mustererkennung und Bildverarbeitung,
Albert­Ludwigs­Universit¨at Freiburg, Am Flughafen 17, D­79085 Freiburg, Germany
Tel: +49­761­203­8260/8261, Fax: +49­761­203­8262
Email: burkhardt@informatik.uni­freiburg.de
Abstract
The paper addresses a central question: What kind of information or measurements are needed for
closed loop control of distributed systems? Is it sufficient to deal with projections or do we need
tomographic data? The answer to these questions is strongly related to properties derived from
``observability'' and ``controllability'' of a process. It can be shown that under certain circumstances
both strategies can be equivalent (however not with respect to the computational complexity) and
for what conditions we will have different results. The theoretical results will be illustrated with

Source: Albert-Ludwigs-Universität Freiburg, Institut für Informatik,, Lehrstuhls für Mustererkennung und Bildverarbeitung

Collections: Computer Technologies and Information Sciences