1. Department of Mechanical and Intelligent Engineering, Utsunomiya University, Utsunomiya, Tochigi, Japan
2. Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, Ishikawa, Japan
3. Faculty of Frontier Engineering, Institute of Science and Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan
4. Mechanical System Engineering, Shinshu University, Nagano, Japan