1. School of Mechanical Engineering Hefei University of Technology, Hefei, Anhui, 230009, P.R. China
2. The George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology, Atlanta, Georgia 30332, USA
3. National Engineering Laboratory for Highway Maintenance Equipment, Changan University, Xian, Shanxi 710065, P.R. China
4. AnHui Key Laboratory of Digital Design and Manufacturing, Hefei University of Technology, Hefei, Anhui, 230009, P.R. China.