1. Tribology Research Institute, Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, P.R. China
2. Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P.R. China
3. Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control Engineering, Beijing 100094, P.R. China
4. AVIC Chengdu Aircraft Industrial (Group) Co., Ltd, Chengdu 610092, P.R. China