1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
2. Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming, China
3. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang, China
4. School of Electrical and Information Engineering, Tianjin Key Laboratory of Intelligent Unmanned Swarm Technology and System, Tianjin University, Tianjin, China