Diseño e implementación de un control tolerante a fallos activo utilizando plataformas de bajo costo para control, comunicación y supervisión de un proceso mediante programas de código libre y controladores lógicos programables

Abstract

In industry, specially manufacturing, it is important to supervise and control all processes involved in production. To achieve this goal, it is usually necessary to make use of proprietary software whose costs are high in most cases. Therefore, to communicate the devices of the plant and to perform a proper supervision of the processes it is necessary to have a SCADA system with the field networks to communicate several devices, which implies the acquisition of hardware and software licenses, impliying an important investment and thus limiting its penetration on small and medium enterprises. This project proposes the development of a system of supervision, communication and fault tolerance control that make use of programmable logic controllers (PLCs) and low cost platforms to perform this task. A direct current (DC) motor is used as the case study. The speed measurement is performed through an incremental encoder.

In addition, it is proposed the development of a SCADA system that integrates the industrial communication protocol (OPC), and in the level of execution of manufacturing systems, an active control algorithm is developed with the parity space method for the DC motor, In order to monitor dynamic changes and accommodate faults in real time.