1. A control system for optimizing a power plant, the control system comprising: a chemical loop having an input for receiving an input signal and an output for outputting an output signal; a hierarchical fuzzy control system operably connected to the chemical loop and comprising a plurality of fuzzy controllers, wherein the hierarchical fuzzy control system receives the output signal, optimizes the input signal based on the received output signal, and outputs an optimized input signal to the input of the chemical loop to control a process of the chemical loop in an optimized manner.