1. Department of Instrumentation and Control Engineering, Faculty of Engineering; King Mongkut's Institute of Technology Ladkrabang; 1, Soi Chalongkrung1 Ladkrabang Bangkok 10520
2. Department of Electrical Engineering; Fukuoka Institute of Technology; 3-30-1 Wajirohigashi Higashi-ku Fukuoka 811-0295 Japan
3. Mitsubishi Heavy Industries Ltd; 5-717-1 Hukahori-cho Nagasaki 851-0392 Japan