1. a Faculty of Engineering Systems and Technology, Graduate School of Science and Engineering, Saga University, 1-Honjomachi, Saga 840-8502, Japan
2. b Department of Advanced Systems Control Engineering, Graduate School of Science and Engineering, Saga University, 1-Honjomachi, Saga 840-8502, Japan
3. c Department of Advanced Systems Control Engineering, Graduate School of Science and Engineering, Saga University, 1-Honjomachi, Saga 840-8502, Japan
4. d Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University, 1-Honjomachi, Saga 840-8502, Japan