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Modeling and Control of Small-Scale Underground Mine Ventilation Networks
Modelado y control de redes de ventilación de minas subterráneas de pequeña escala
DOI:
https://doi.org/10.15446/ing.investig.90968Keywords:
Ventilation, modeling, control systems, mines (en)Vebtilación, Modelado, sistemas de control, minas (es)
This paper presents a nonlinear model and a control strategy to regulate airflow in small-scale underground mine ventilation networks. In underground ventilation control systems, a sensor and an actuator for each branch are usually considered. However, in small-scale underground mines, it is too expensive to have automatic doors for controlling the air flow in each tunnel, as well as to install flow and gas sensors in each branch. In order to regulate airflow in small-scale underground ventilation networks, the number of sensors and actuators is regarded as a limitation for practical installation. This work presents an alternative modeling of the network, with direct control of the airflow in each tunnel, by varying the speed of the fans available on the external surface of the mine. A state space model is presented, and a linear quadratic controller with integral action and a state estimator is designed. To validate the model and the controller, a network ventilation system for a small-scale mine with nine branches (tunnels) and two actuators (fans) is presented.
Este artículo presenta un modelado no lineal y una estrategia para el control del flujo de aire en redes de ventilación de minas subterráneas de pequeña escala. Para los sistemas de control de ventilación subterránea usualmente se consideran un sensor y un actuador en cada rama. Sin embargo, en las minas subterráneas de pequeña escala, es muy costoso colocar puertas automáticas para controlar el flujo de aire en cada túnel, as ́ı como instalar sensores de flujo y gas en cada rama. Con el fin de regular el flujo de aire en redes de ventilación subterránea de pequeña escala, se considera el número de sensores y actuadores como una limitante para la instalación práctica. Este trabajo presenta una alternativa para el modelado de la red, con control directo del flujo de aire en cada túnel, a través de la variación de velocidad de los ventiladores disponibles en la superficie externa de la mina. Se presenta un modelo de espacio de estado y se diseña un controlador cuadrático lineal con acción integral y un estimador de estado. Para
validar el modelo y el controlador, se presenta un sistema de red de ventilación para una mina de pequeña escala con nueve ramas (túneles) y dos actuadores (ventiladores).
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Copyright (c) 2022 Oscar Oswaldo Rodriguez Diaz, Edinson Franco-Mejía, Esteban Rosero
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