1. School of Artificial Intelligence and Automation, Engineering Research Center of Autonomous Intelligent Unmanned Systems, Huazhong University of Science and Technology, Wuhan, China
2. School of Artificial Intelligence and Automation, Engineering Research Center of Autonomous Intelligent Unmanned Systems and the State Key Lab of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China
3. School of Robotics, Hunan University, Hunan, China
4. Institute of Engineering and Technology, University of Groningen, Groningen, The Netherlands