1. Associate Professor, School of Automation, Northwestern Polytechnical Univ., Xi’an, Shaanxi 710072, China (corresponding author).
2. Ph.D. Student, School of Automation, Northwestern Polytechnical Univ., Xi’an, Shaanxi 710072, China.
3. Engineer, Shanghai Institute of Satellite Engineering, Shanghai 201109, China.
4. Professor, School of Automation, Northwestern Polytechnical Univ., Xi’an, Shaanxi 710072, China.