1. DHV BV, PO Box 1132, 3800 BC, Amersfoort, The Netherlands and Delft Center for Systems & Control, Delft University of Technology, Mekelweg 2,2628 CD Delft, The Netherlands
2. Faculty of Civil Engineering and Geosciences, Delft University of Technology, PO Box 5048, 2600 GA, Delft, The Netherlands
3. Delft Center for Systems and Control, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands