Sistema didático de fluxo de calor para estudo de controle de processos

Abstract

The control of industrial processes must be preceded by the identification of the plant / process. Techniques of identification and control of industrial processes have been developed over the years, however during the academic training of the professional in control and automation a process may not always available for identification and control. In the present study, a didactic system of heat flow was constructed as a way to simulate an industrial process to be modelled and controlled. Two identification techniques has been employed, the response to the step, proposed by Ziegler-Nichols, and the standard relay method. The control of the plant was done in closed loop with PID, one tuned by the parameters indicated by Ziegler-Nichols and another by the criterion of minimization of the integral of the absolute error. These two strategies of controller tuning and process identification were effective, reaching the set point desired in the process.