1. Department of Mechanical Engineering and Product Design Engineering, Swinburne University of Technology, Hawthorn, VIC, Australia
2. Department of Vehicle Drives and Transmissions, Technische Universitat Braunschweig, Braunschweig, Niedersachsen, Germany
3. Engineering Institute of Technology, West Perth, WA, Australia
4. Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA