1. Ph.D. Candidate, School of Aerospace Science and Engineering, National Univ. of Defense Technology, Changsha, Hunan 410073, China.
2. Associate Professor, School of Aerospace Science and Engineering, National Univ. of Defense Technology, Changsha, Hunan 410073, China.
3. Professor, School of Aerospace Science and Engineering, National Univ. of Defense Technology, Changsha, Hunan 410073, China (corresponding author).