1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan, People’s Republic of China
2. Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, Chengdu, Sichuan, People’s Republic of China
3. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan, People’s Republic of China
4. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi, People’s Republic of China
5. Department of Engineering, University of Aberdeen, Aberdeen, UK
6. School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, People’s Republic of China
7. Birmingham Centre for Railway Research and Education, University of Birmingham, Birmingham, UK