1. Key Laboratory of Science and Technology on UAV, Northwestern Polytechnical University, Xi’an 710065, China
2. School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
3. Innovation Group of Marine Engineering Materials and Corrosion Control, Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519080, China
4. Department of Mechanical Engineering, The University of Akron, Akron, Ohio 44325, USA