1. School of Mechanical Engineering, Xijing University, Xi’an, Shaanxi, China
2. Henan High Speed Railway Operation and Maintenance Engineering Research Centers, Henan Railway Vocational & Technical College, Zhengzhou, Henan, China
3. Department of Mechanical & Electrical Engineering, Xijing University, Xi’an, Shaanxi, China
4. School of Mechanical Engineering, Xi’an Shiyou University, Xi’an, Shaanxi, China