1. Department of Mechatronics, Optics and Mechanical Engineering Informatics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest H-1521, Hungary e-mail:
2. Department of Mechanical Engineering and Centre for Intelligent Machines, McGill University, 817 Sherbrooke Street, West, Montréal, QC H3A 0C3, Canada e-mail:
3. Department of Mechanical Engineering and Centre for Intelligent Machines McGill University, 817 Sherbrooke Street, West, Montréal, QC H3A 0C3, Canada e-mail: