1. School of Energy and Power Engineering, Beihang University, Beijing, P.R. China
2. Beijing Key Laboratory of Aero-Engine Structure and Strength, Beihang University, Beijing, P.R. China
3. School of Transportation Science and Engineering, Beihang University, Beijing, P.R. China
4. Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control Engineering, Beijing, P.R. China