“…Number of rules MSE Box and Jenkins (1970) 6 0.202 Tong (1980) 2 0.469 Sugeno and Yasukawa (1993) 3 0.19 Xu and Lu (1987) 2 0.328 Pedrycz (1984) 2 0.321 Chen, Xi, and Zhang (1998) 2 0.268 Kroll (1996) 2 0.149 Evsukoff, Branco, and Galichet (2002) 2 0.090 Kim et al (1997) 6 0.062 6 0.055 Chiu (1996) 3 0.072 Tsekouras (2005) 6 0.075 Bagis (2008) 4 0.148 Our model 3 0.056 for turbine, u 3 is level of feedwater regulator, y 3 is level of drum (m), a cs is coefficient for the quality of steam, a cs ¼ ð1 À 0:001538x 3 Þð0:8x 1 À 25:6Þ x 3 ð1:0394 À 0:0012304x 1 Þ ;…”