1. College of Agricultural Engineering, Shanxi Agricultural University, Taigu 030801, China
2. Dryland Farm Machinery Key Technology and Equipment Key Laboratory of Shanxi Province, Taigu 030801, China
3. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
4. College of Mechanical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China