RESEARCH OF CONTROLLERS AND REGULATORS FOR TEMPERATURE CONTROL OF HEAT EXCHANGER SYSTEM

Abstract

This article considers the study of PID and internal model controllers (IMC) for temperature control of a heat exchanger system. The purpose of the study is to compare the effectiveness of different control methods and determine the most effective control strategy that can be adapted to a specific industrial system.

A mathematical model of the heat exchanger system was created. The classical PID controller was tuned using the Ziegler–Nichols method. In addition, a control method based on the internal model was introduced. The efficiency of each controller was checked by simulation in the MATLAB environment. The results were evaluated using step response, redundancy and error indices (IAE, ISE, ITAE, ITSE).

PID controller: 29.56% overshoot, 115.2 seconds settling time, ITAE = 610.8. IMC controller: 1.13% overshoot, 77.79 seconds settling time, ITAE = 279.5. It was found that the IMC controller increased the stability of the system and significantly reduced the error rate.

Although the PID controller is a simple and widely used method, the system suffers from overshoot and long settling time. The internal model controller improves the control quality and increases the system performance. IMC can be proposed as an effective alternative in industrial control systems. According to the simulation results, the IMC is capable of stable and accurate temperature contro