1. National Key Laboratory of Science and Technology on UAV, Northwestern Polytechnic University, Xi’an 710072, China
2. Innovation Group of Marine Engineering Materials and Corrosion Control, Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519080, China
3. The First Aircraft Institute of AVIC, Xi’an 710089, China
4. Department of Mechanical Engineering, The University of Akron, Akron, Ohio 44325, USA