1. Key Laboratory of Hebei Province on Scale-span Intelligent Equipment Technology, and School of Mechanical Engineering, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
2. Wuhan Marine Electric Propulsion Research Institute, Wuhan 430064, China
3. Hunan Aerospace Kaitian Water Services Co., Ltd., Changsha 410100, China
4. State Key Laboratory of Reliability and Intelligence Electrical Equipment, Hebei University of Technology, Tianjin, 300130, China