1. Institut Pascal/University Blaise Pascal-UMR CNRS 6602, Aubiére cedex 63171, FrancebKorea Institute of Science and Technology, Center for Bionics, Hwarangno 14-gil 5, Seoul 136-791, Republic of Korea
2. Korea Institute of Science and Technology, Center for Bionics, Hwarangno 14-gil 5, Seoul 136-791, Republic of Korea
3. Korea Institute of Science and Technology, Center for Bionics, Hwarangno 14-gil 5, Seoul 136-791, Republic of KoreacKorea University of Science and Technology, Department of Biomedical Engineering, 217 Gajeong-ro Yuseong-gu, Daejeon 305-350, Republic of K
4. Korea Institute of Science and Technology, Center for Bionics, Hwarangno 14-gil 5, Seoul 136-791, Republic of KoreadKorea University of Science and Technology, Department of HCI and Robotics, 217 Gajeong-ro Yuseong-gu, Daejeon 305-350, Republic of Korea