1. Group for Research on Automatic Control Engineering, Department of Engineering, University of Sannio, 82100, Benevento, Italy.
2. Key Laboratory of System and Control, Academy of Mathematics and System Science, University of Chinese Academy of Sciences, Beijing 100190, China.
3. Australian Center for Field Robotics, School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2008, Sydney.
4. Division of Automatic Control, Department of Electrical Engineering, Linköping University, SE-58183 Linköping, Sweden.