1. Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi’an Jiaotong University, Xi’an 710049, China
2. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3. School of Manufacturing Science and Engineering, Key Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China