1. Professor, School of Astronautics, Northwestern Polytechnical Univ., Xi’an 710072, China; National Key Laboratory of Aerospace Flight Dynamics, Northwestern Polytechnical Univ., Xi’an 710072, China.
2. School of Astronautics, Northwestern Polytechnical Univ., Xi’an 710072, China; National Key Laboratory of Aerospace Flight Dynamics, Northwestern Polytechnical Univ., Xi’an 710072, China.
3. Professor, Research Center for Unmanned System Strategy Development, Northwestern Polytechnical Univ., Xi’an 710072, China; Unmanned System Research Institute, Northwestern Polytechnical Univ., Xi’an 710072, China; Northwest Institute of Mechanical and Electrical Engineering, Xianyang 712000, China; National Key Laboratory of Aerospace Flight Dynamics, Northwestern Polytechnical Univ., Xi’an 710072, China (corresponding author). ORCID: .
4. School of Astronautics, Northwestern Polytechnical Univ., Xi’an 710072, China; National Key Laboratory of Aerospace Flight Dynamics, Northwestern Polytechnical Univ., Xi’an 710072, China; Dept. of Electrical and Computer Engineering, National Univ. of Singapore, Singapore 117576. ORCID: .