Affiliation: | 1. SINTEF ICT Applied Cybernetics , N-7465, Trondheim, Norway Lars.Imsland@sintef.no;3. Department of Automatic Control and Systems Engineering , University of Sheffield , Mappin Street, S1 3JD, UK;4. Katholieke Universiteit Leuven , ESAT-SCD-SISTA, Kasteelpark Arenberg 10, B-3000 Leuven (Heverlee), Belgium |