1. Ph.D. Candidate, National Key Laboratory of Aerospace Flight Dynamics, School of Astronautics, Northwestern Polytechnical Univ., Xi’an, Shaanxi 710072, China.
2. Professor, National Key Laboratory of Aerospace Flight Dynamics, School of Astronautics, Northwestern Polytechnical Univ., Xi’an, Shaanxi 710072, China.
3. Assistant Professor, National Key Laboratory of Aerospace Flight Dynamics, School of Astronautics, Northwestern Polytechnical Univ., Xi’an, Shaanxi 710072, China (corresponding author).