1. College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, People's Republic of China
2. Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province, Xihua University, Chengdu, People's Republic of China
3. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, People's Republic of China
4. School of Mechatronics Engineering, Southwest Petroleum University, Chengdu, People's Republic of China
5. CRRC Industrial Research Institute (Qingdao) Co. LTD, Qingdao, People's Republic of China