Improving performance and stability of MRI methods in closed-loop

Two representative approaches for MRI methods are reported in the literature. The first one is based on the solution of an optimal problem, while the second is based on the prefiltering of the system input and output signals. Each method has advantages and disadvantages according to the process to identify, the length of the prediction horizon or its mathematical implementation. Herein a new MRI method is proposed (C-EMPEM), based on the advantages of both algorithms and on some improvements. The new method was developed to identify either closed-loop or open-loop systems. A comparison is performed among some MRI and PEM methods and the new one proposed, considering a closed-loop system. The results indicate that in the studied case, the performance of the new method is better.