1. School of Electromechanical EngineeringXidian UniversityNo.2 Taibai South RoadXi'an710071People's Republic of China
2. Xinjiang Astronomical ObservationChinese Academy of SciencesNo.150 Science 1‐StreetUrumqi830011People's Republic of China
3. Department of Mechanical EngineeringUniversity of ChesterChesterCH2 4NUUK
4. Department of Mechanical EngineeringAston UniversityAston TriangleBirminghamB4 7ETUK