Cascade control strategy to regulate the liquid level in a didactic process station

Abstract

Information on industrial process control and the techniques used to achieve stability in the regulation of the liquid level in a reservoir was analyzed, the response of the process output variable to a disturbance in the plant was examined, as well as the advantages of using control strategies in industrial processes. The objective is to implement a cascade control strategy to regulate the liquid level in a reservoir of a didactic module. The deductive method was applied to analyze the information on process control techniques and strategies in the cited articles. It resulted in a design of a cascade strategy developed in frequency domain and implemented in a didactic module to control the liquid level from the process flow variable. It was concluded that the application of a  cascade strategy for liquid level control generates a stable and fast correction process against disturbances, based on PI integral proportional control techniques.