1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen518060People's Republic of China
2. College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060People's Republic of China
3. School of Electrical EngineeringBeijing Jiaotong UniversityBeijing100044People's Republic of China
4. School of Automation Science and Electrical EngineeringBeihang UniversityBeijing100191People's Republic of China
5. Department of Electrical and Computer EngineeringTexas A&M UniversityCollege StationTX77843USA
6. Department of Electrical and Computer EngineeringUniversity of CoimbraCoimbra3030‐290Portugal
7. Institute of Systems and RoboticsUniversity of CoimbraCoimbra3030‐290Portugal