1. Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment Hefei University of Technology Hefei 230009 P. R. China
2. Intelligent Materials and Systems Laboratory Institute of Technology University of Tartu Nooruse 1 Tartu 50411 Estonia
3. School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 P. R. China
4. Jiangsu Key Laboratory of Special Robot Technology Hohai University Changzhou 213022 P. R. China