1. The 20th Research Institute, China Electronics Technology Group Corporation, Shaanxi, Xi’an 710068, China.
2. Professor, Institute of Precision Guidance and Control, Northwestern Polytechnical Univ., Shaanxi, Xi’an 710072, China.
3. Dept. of Aeronautical and Aviation Engineering, The Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong (corresponding author).