Methods of Automatic Control Applied to a Resistive Furnace for Thermal Treatments
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2013, Vol 37, Issue 37
Abstract
The paper deals with the study of two methods used for the automatic control of the temperature of the parts from inside a resistive furnace for thermal treatment. The furnace was previously projected and simulated, as presented in other papers. After that it was created a smaller furnace in the laboratory in order to validate the results obtained through simulation. Together with the furnace it was also created the automaton system, which was connected through a microcontroller to the computer. The automation system uses an Arduino ATMega microcontroller, which communicates with the computer through a serial port. Inside the computer, using Matlab, we have created different programs, in order to receive the information from the sensors, to establish the command coefficients, based on different calculation methods, and to send these coefficients back to the automation system. We have used PID control and predictive control methods, in order to maintain the temperature of the parts to be heated on a technological curve imposed by the manufacturer. We control thus, the power of the heaters and of the ventilators of the furnace. The furnace is equipped with three resistors inside of it, and a ventilator and an exhauster. In the end is made a comparison between the command coefficients used in the two cases. This comparison is based first on the calculation of the mean square error, between the imposed temperature and the temperature of the parts, and secondly, on the evolution of the control indices.
Authors and Affiliations
Andreea-Maria Neaca, Mitica-Iustinian Neaca
Keywords
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