Design and implementation of an oven temperature controller using labview

Abstract

In this project, a closed loop temperature control system of an oven plant is designed and implemented including a digital computer, a data acquisition board together with a combination of hardware interfacing circuits and implementing a digital controlling algorithm. The temperature of the oven is measured using the RTD sensor and a signal conditioning circuit. This temperature feedback measurement from the plant is provided to the digital controller for calculating the required output to control the plant actuator (heating element). The temperature digital controller is requested to have the best performances in response to disturbances as step input temperature reference changes and also to step load changes. In the case of accurate oven temperature-controlled application, the performance of the controller does not tolerate output overshoot and a reduced settling time is needed for optimizing production and hence affects the oven property of production efficiency. Different tuning methods for the PID controller are explored, and their results are also presented. In addition to the PID controller, alternative control methods are proposed for improving the performance and reducing the overshoot in a first-order plus dead time temperature system. These alternative controllers include the Smith Predictor. This project provides valuable insights into the development and design of a feedback control system. The system ensures that the oven temperature remains stable at a predefined set point. It comprises a data acquisition unit that facilitates communication between the PC, the sensor conditioning circuit, and the power triac circuit, that control the amount of power delivered to the oven.