1. Lecturer, Dept. of Aerospace, Beijing Institute of Technology, Zhongguanchun South St., Beijing 100081, P.R.China (corresponding author).
2. Assistant Professor, Dept. of Aerospace, Beijing Institute of Technology, Zhongguanchun South St., Beijing 100081, P.R.China.
3. Senior Research Engineer, Beijing Institute of Mechanical Equipment, Yongding St., Beijing 100039, P.R.China.