1. School of Automation, Northwestern Polytechnical University, Xi’an, China
2. Department of Mechanical Engineering, National University of Singapore, Queenstown, Singapore
3. College of Electrical Engineering, Zhejiang University, Hangzhou, China
4. Powertrain Department, General Research and Design Institute, FAW, Changchun, China
5. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China