1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, P. R. China
2. School of Automotive Engineering, Changshu Institute of Technology, No. 99 Hushan Road, Changshu, Suzhou 215500, P. R. China
3. Department of Mechanical Engineering, Nanjing Institute of Industry Technology, Nanjing 210046, Jiangsu, P. R. China
4. Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, P. R. China