Wonseok Shin1*, DongWoo Nam2,
3*, Ung Heo1, Jung Kim1 and Bummo
Ahn2, 3
1 Department of Mechanical
Engineering, Korea Advanced Institute of Science and Technology (KAIST),
Daejeon, Korea
2 Korea Institute of Industrial Technology
(KITECH), Ansan, Korea
3 Department of Robotics Engineering,