Abstract
As an important industrial process, power plant unit has features of nonlinearity, high-order large inertia and delay. Firstly, to overcome the unsatisfactory nature of the system, a nonlinear state observer is constructed based on Luenberger observer structure principle in this paper. Luenberger observer estimates system states accurately. Secondly, linear matrix inequality (LMI) approach based on Lyapunov stability theory can be employed to select the observer gain matrix, which eliminates the blindness of selecting the gain matrix. Finally, the proposed observer design method is illustrated on a power plant model. The simulation results demonstrate the feasibility and superiority of nonlinear state observer.
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