1. School of Mechanical and Electrical Engineering, Liuzhou Vocational and Technical College, Liuzhou, China
2. Faculty of Intelligent Manufacturing, Nanning University, Nanning, China
3. Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment, Guangxi University, Nanning, China
4. School of Automotive Engineering, Liuzhou Vocational and Technical College, Liuzhou, China