1. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi Prov., P.R. China 710049; Department of Mechanical Engineering, S. M. Wu Manufacturing Research Center,Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109,
2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an,Shaanxi Prov., P.R. China 710049
3. S. M. Wu Manufacturing Research Center, Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109
4. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi Prov., P.R. China 710049