Aplicación del control difuso utilizando PLD, en un turbo mezclador y un evaporador eléctrico para el Laboratorio de Procesos Industriales, Escuela Ingenieria Quimica ESPOCH.

Abstract

The logic diffuse application in a Mixer and an Electric Evaporator for the Laboratory of Industrial Processing, Chemistry Engineering College at Escuela Superior Politecnica de Chimborazo. For this, a Programmable Logic Controller Siemens S7-1200 DC/DC/DC was elected, a frequency Sinamics shifter G110, a module of analogic output of 0 – 10 volts and an optical Encoder, with which the revolutions to the three – phase motor was turning out and obtained to make the speed control of the same in the Mixer. For the Electric Evaporator a module and a thermocouple type J were required, with the sensor the inner temperature of the marmite will be being monitoring. A relay in solid state since they are suitable to commute to high frequencies and to control the electric resistances, were used. The logic diffuse was made by using the algorithm of Mamdani, the linguistic variables were identified, such as the speed for the mixer and the temperature for the electric evaporator. Moreover, the discourse universe was established, the linguistic terms and triangular and trapezoidal memberships. The programming of the “Fuzzification”; Inference and “Defuzzification”, was made by using the Tool Fuzzy System Designer of Software LabVIEW, where all the Supervisions, Control and Acquisition of Data were made. In addition, a better interaction of the student with the equipment was necessary to implement a Man-Machine Interface HMI Siemens KP-300. Through Lab test made to the equipment was proved the trajectory of the speed and temperature graphic, which responds in a satisfactory way with the Set-Point to define an optimal diffuse controller. It is recommended to install the modules Real-Time and NI-OPC Server that allows creating servers of input-output to permit the communication between the Programmable Logic Controller (PLC) and LabVIEW.