“…In Wang et al (2002), a hybrid PID/Fuzzy control system is implemented for the control of the steam temperature and water level of a steam boiler in a large-scale thermal power plant. In Glickman et al (2004), a PID optimization procedure is propose specially for power plants taking into account robustness restrictions. In Labibi et al (2009), a robust decentralized PID tuning is proposed and implemented in a real boiler while sliding mode control and H ∞ control are applied in Moradi et al (2009).…”