Projeto e implementação de um controlador de velocidade para uma bancada didática de CLP Siemens S7-1200

Abstract

This Final Course Project describes the design and implementation of a speed control loop on a didactic automation test bench, using a DC motor, a Siemens S7-1200 PLC, and a supervisory system. The main objective was to develop a low-cost and versatile solution for the practical teaching of process control. The methodology included the instrumentation for speed measurement, featuring a 3D-printed encoder disk, the development of a signal conditioning circuit, the implementation of a PID controller in TIA Portal, and the creation of an interface in the Elipse E3 supervisory system for real-time monitoring and online tuning. The system was validated, and an optimal operating range between 800 and 2130 RPM was identified. A comparative analysis of the Ziegler-Nichols, CRH, and Cohen-Coon tuning methods was performed, which revealed that the Ziegler-Nichols and CRH methods were the most suitable for the plant, providing stable control and good performance. The project resulted in a functional pedagogical tool that allows students to practically explore the theoretical concepts of control systems.