1. School of Reliability and Systems Engineering, Beihang University, WeiMin Building 440, No. 37 XuanYuan Road, Beijing 100191, China e-mail:
2. School of Reliability and Systems Engineering, Beihang University, WeiMin Building 429, No. 37 XuanYuan Road, Beijing 100191, China e-mail:
3. School of Reliability and Systems Engineering, Beihang University, WeiMin Building 434, No. 37 XuanYuan Road, Beijing 100191, China e-mail:
4. School of Energy and Power Engineering, Beihang University, WeiMin Building 429, No. 37 XuanYuan Road, Beijing 100191, China e-mail:
5. China Aeronautical Radio Electronics Research Institute, No. 432 Ziyue Road, Minhang District, Shanghai 200241, China e-mail: