1. Department of Mechanical and Intelligent Systems Engineering, National Institute of Technology, Kumamoto College, Kumamoto, Japan.
2. Faculty of Engineering, Department of Mechanical Engineering, Kyushu University, Fukuoka, Japan.
3. Faculty of Engineering, Department of Intelligent Mechanical Engineering, Fukuoka Institute of Technology, Fukuoka, Japan.
4. Department of Mechanical Engineering, Tokyo University of Science, Yamaguchi, Japan.