1. Department of Mechatronics and Automotive Engineering, Qingyuan Polytechnic, Qingyuan, China
2. Department of Intelligent Control, Guangzhou Light Industry Vocational School, Guangzhou, China
3. Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education, School of Physics and Electronic Electrical Engineering, Xiangnan University, Chenzhou, China