Robust controller design for a pressurised heavy water reactor

In this paper, a method is proposed to design a robust controller for an uncertain system using a fast output sampling technique. An LMI approach is used to design robust feedback for the uncertain system. The fast output sampling control allows the realization of the robust state feedback gain simultaneously for a family of linear models. But in practice there are two problems with exact realization of this state feedback i.e. poor error dynamics and noise sensitivity. Hence the problem is further posed as an LMI problem to overcome the undesired effects. The method does not require the states of the system for feedback. The method is illustrated by a practical system example.