Estudo e aplicação de técnicas de identificação de sistemas multivariáveis a uma planta térmica didática.

Abstract

Problems in several domains can be solved by using oriented approaches to systems and, by that, the study of their behaviour are truly necessary. The dynamics of a system can be represented by a model, which is an image of a reality focused on a predetermined application. The most applied models in the context of engineering, and more specifically for control, are the mathematical models and the process of creation of a model is called modeling. There are two possibilities of realization to this process: the theoretical modeling and the experimental modeling, also known as identification. In the identification of systems, the model is obtained based on measurement of a series of input and output data of themselves, as it is extensively used in practice by virtue of the high complexity related to the theoretical modelling. In this study, it is detailed two techniques of system identification: the least squares and output error. These two identification methods have their approach expanded subsequently, for the application in the case of systems with multiple inputs and multiple outputs. Therefore, the two techniques are applied in practice with the intent of obtaining a model for a thermal didactic plant.