1. Department of Mechatronics Engineering, Korea University of Technology & Education, Cheonan-si, Republic of Korea
2. Department of Mechanical Engineering, Myongji University, Yongin-si, Republic of Korea
3. Department of Mechanical and Aerospace Engineering, NC State University, Raleigh, North Carolina, USA
4. IPS Team, Hanwha Systems, Gyeongsangbuk-do, Republic of Korea