The LQG/Dynamic digital control system design for the nuclear steam generator water level

The steam generator feedwater and level control system is designed by two steps of the feedwater control design and the feedback loop controller design. The feedwater servo system is designed by the optimal LQR/LQG approach and then is modified by the LTR method to recover the dynamic properties are considered in the design of the feedback controller. All the designs are made in the continuous domain and are digitalized by applying the proper sampling period. The system is simulated for the two cases of power increase and decrease. From the results of simulation, it is found that the controller constants would rather be invariable during the power increase, while for the case of power decrease they should be changed with the power variation to keep the system stability. 13 figs., 2 tabs., 11 refs. (Author)