Controle PID e Preditivo â Aspectos TeÃricos e de ImplementaÃÃo PrÃtica / Control PID AND Predictive - Theoretical Aspects and Practical Implemantation


IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia




Nowadays, we observe the exponential increasing of demand for performance optimization in all areas of modern life. This search for better performances is also occurring in all industry sectors, either factory or energy activities. This best performances reflects an increase is all levels and achieve enormously the process control systems. With more strict performance requirement, technique formerly studied only in academic circle has been migrate for industry area, opening new horizons and establishing new concepts in general. It is not different with the process control systems, even in particular at the lowest level of implementation (factoryâs floor) has been noted a constantly update. This paper is inserted into this last concept, in other words, into the project of control mesh of process control systems. Thus the aspect of syntony of conventional controllers like PID (Proportional, Integral, Derivative) multivariable (MIMO) and MIMO predictive controllers based on models like GPC (Generalized Predictive Control) type are studied aiming to the practical implementation. Several system control aspects, such as identification of process through parametric and nonparametric technical with different representations and aspects of decoupling between the process meshes, as it is MIMO system, are also dealt, discussed and implemented. For that purpose, two development platforms were developed at IFPIâs NEE (NÃcleo de Engenharia ElÃtrica) laboratory. The first platform consists of MIMO system of ventilation and heating; the second platform is a system of coupled double tanks. As a conclusion of the study of practical experiments conducted, can be established that the best control for a process depends on the application for which it is destined and for the proper functioning is necessary the theoretical and practical knowledge of the dynamic of the process. Thus a proper controller depends also on the use of a technique for proper identification.


pid gpc control decoupling controle de processos eletronicos, retroalimentacao controladores pid engenharia elÃtrica controle preditivo

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