1. College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213000, China
2. Changzhou Key Laboratory of Intelligent Manufacturing Technology and Equipment, Hohai University, Changzhou 21300, China
3. Nanjing Institute of Agricultural Mechanization, Ministry of Agricultural and Rural Affairs, Nanjing 210094, China
4. Nanjing Research Institute of Electronic Engineering, Nanjing 210007, China