Nguyen Van Toan is the Principle Researcher at Robotics R&D center, Syscon, Robot Land, South Korea. He is currently completing his Doctor of Philosophy at Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul, South Korea. Phan Bui Khoi received his Doctorate degree in Robotics from Mechanical Engineering Research Institute of the Russian Academy of Sciences in 1997. He is Assoc. Professor of dynamics and control of robot and mechatronic system at Hanoi University of Science and Technology.