1. Postdoctoral, State Key Laboratory for Manufacturing System, Xi ’an Jiaotong Univ., No. 28 Xianning West Rd., Xi’an, Shaanxi 710049, China.
2. Professor, Key Laboratory of Education Ministry for Modern Design and Rotor-bearing System, Xi’an Jiaotong Univ., No. 28 Xianning West Rd., Xi’an, Shaanxi 710049, China.
3. Professor, State Key Laboratory for Manufacturing System, Xi’an Jiaotong Univ., No. 28 Xianning West Rd., Xi’an, Shaanxi 710049, China (corresponding author).
4. Doctoral Student, State Key Laboratory for Manufacturing System, Xi’an Jiaotong Univ., No. 28 Xianning West Rd., Xi’an, Shaanxi 710049, China.