“Control de velocidad de un motor DC a través de la nube, mediante la tarjeta STM32F4 Discovery utilizando herramientas IoT”

Abstract

In this project, a control plant was developed emul ating an industrial process under the supervision of a Proportional, Integral and Derivative control loop better known as PID control. The industrial process is based on the speed control of a direct current motor using a tachometer with an encoder of 100 pulses per revolution to obtain the highest resolution and with an H bridge that incorporates the L298 chip. The modeling and tuning of the plant was solved by means of the MATLAB tool to achieve a more realistic approach. The PID control algorithm was implemented in C / C ++ language in the ST IDE called STM32cubeIDE, in addition to being the native and formal language of the manufacturer of the STM32F4 Discovery card, which is highly robust for this type of industrial process. An MQTT message broker was u sed to send and receive customer data to the plant and vice versa achieving great stability and acceptable latency for a remotely supervised control process. For the graphical interface for the operator, the Node-Red dashboard was used where two types of indicators of the plant variables were implemented, such as the sensor value, the motor power and the error calculated at that instant of time and for the control of the PID loop has been incorporated slider so that the operator can change the control value s that are executed as soon as the slider of the variable that he is manipulating is fixed.