DISEÑO DE UN CONTROL DE TEMPERATURA DIFUSO PARA UN TÚNEL DE SECADO DE CÍTRICOS (TEMPERATURE FUZZY CONTROL DESIGN FOR A CITRUS DRYING TUNNEL)
Resumen
El limón mexicano es un producto de mercado internacional y las empacadoras de cítricos realizan esfuerzos para cumplir con las normas de calidad e inocuidad de esta fruta. Una planta empacadora es proceso de industrialización que consta de diferentes etapas, entre estas, se incluyen un presecado y secado, al sanitizado y encerado, respectivamente, que consisten en hacer circular el limón mediante una banda transportadora por un túnel con flujo de aire caliente para extraer la humedad en su superficie. Sin un control adecuado de temperatura, el fruto presentará humedad o deshidratación. En este trabajo se presenta el modelado y control difuso de temperatura de un túnel de secado. Con datos experimentales de entrada-salida en lazo abierto se identifican los parámetros del modelo para diseñar el controlador. Los resultados se validan con simulaciones, evidenciando que el set-point de temperatura se alcanza en menos de 100s sin sobresalto, con un buen desempeño evitando el estrés térmico.
Palabras Clave: Control difuso, control de temperatura, túnel de secado.
Abstract
The Mexican lemon is an international market product. The citrus packing companies make efforts to comply with the quality and safety standards of this fruit. A citrus packing plant is an industrialization process that consists of different stages, including pre-drying after sanitizing and drying after waxing, which consists on make circulate the lemon through a conveyor belt inside of a tunnel with hot air flow to extract moisture on its surface. If there is not an adequate temperature control, the fruit will show moisture or dehydration. In this paper the modeling and diffuse temperature control for drying tunnel is presented. Using open-loop input-output experimental data, the model parameters are identified to design a fuzzy control. The results are validated with numerical simulations, showing that the temperature set-point is reached in less than 100s without overshoot, which is a good performance avoiding thermal stress.
Keywords: Drying tunnel, fuzzy control, temperature control.
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