1. Robotics Institute, Ningbo University of Technology, Ningbo, China
2. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
3. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
4. Key Laboratory of More Electric Aircraft, University of Nottingham, Ningbo, china