| | University of Cambridge: Control Group (Site not responding. Last check: 2007-10-11) |
 | | Quantitative and qualitative results that characterise the uncertainty types to which LPTV, closed-loop systems can be desensitised are established in terms of the gap metric, which is a measure of the distance between the graphs of two systems. |
 | | This plays a crucial role in the development of the main quantitative robustness result, which identifies the largest gap-ball of LPTV plants, centred at a nominal plant, that a nominal, stabilising controller is guaranteed to stabilise. |
 | | Qualitatively, it is established that the topology induced by the gap metric on quite a general class of LPTV systems, is the weakest with respect to which closed-loop performance varies continuously and closed-loop stability is a robust property. |
| www-control.eng.cam.ac.uk /Homepage/publication.php?id=144 (542 words) |