1. Department of Mechanical EngineeringNanjing University of Science and TechnologyNanjing210094NanjingPeople's Republic of China
2. Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooONN2L3G1Canada
3. State Key Laboratory of Mechanical TransmissionsCollege of Automotive Engineering, Chongqing UniversityChongqing400044ChongqingPeople's Republic of China