Experimental and Theoretical Investigation of the Response of the Liquid Level Controller

Abstract

This paper shows a mechanical manufactured design test for a water tank level control system. The purpose of this mechanical controller is to maintain the water level in the tank at the desired level as the process operator wish according to the manufacturing process requirements. That means the process operator as the observer have the ability to change the setting of input water level to control the actual output water level in the tank. The problem which is frequently encountered in manufacturing processes lines and even in nuclear power stations is to maintain the water level in the tanks at its desired level as the wish of human operator process. So, the purpose of this study is to submits a controller system to compensates and fill deficiency to the needs for a cheap, reliable, low maintenance controller. As a used method of this paper, an experimental results to control the system response had been tested. A proposed mathematical model had been derived, and simulated on a model using MATLAB/Simulink program. The experimented and the simulated results had been compared in different responses to give at the end a satisfactory level control results of the water tank. The major conclusions reached in this paper are a proposition of a simple automatic mechanical water level controller in a tank, which has the ability to accept manually step input changes of the water level, with a pressure sensor works as a system feedback. Being in mind that the manufacturing of the four sides of the water tank also all valves and pipes are taken as a plastic transparent made, to interact the students educational criteria with the main response controller of the system. Finally a comparison trend being set up between both results to show off the changing remarks happen to the system in both cases of operation.