〇(D)sanath De silva^1,2, Uma Maheswari Rajagopalan³, Li Danyang¹, Hirofumi Kadono¹ (1.Graduate School of Science and Engineering, Saitama University, Japan, 2.Department of Mechanical and Manufacturing, University of Ruhuna, Sri Lanka, 3.Dept. Mech, Eng. Faculty of Engineering. Shibaura Institute of Technology, Japan)