1. Engineer, Beijing Aerospace Automatic Control Institute, China Academy of Launch Vehicle Technology, Beijing 100854, China (corresponding author).
2. Professor, College of Astronautics, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China.
3. Ph.D. Candidate, College of Astronautics, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China.
4. Engineer, Beijing Aerospace Automatic Control Institute, China Academy of Launch Vehicle Technology, Beijing 100854, China.