IJERT-Modelling of Interacting Three Tank System (original) (raw)

Tuning of PID Controller for Three Tank Mixing Process using Matlab

Today, many process control problems can be adequately and routinely solved by conventional PID control strategies. The overriding reason that the PID controller is so widely accepted is its simple structure which has proved to be very robust with regard to many commonly met process control problems as for instance disturbances and nonlinearities. Relay feedback methods have been widely used in tuning proportional-integralderivative controllers due to its closed loop nature. In this work, Relay based PID controller is designed and successfully implemented on three tank mixing process. The performance of a Relay based PID controller for control of three tank mixing process is investigated and performed satisfactorily. The results are compared with bode plot methods for tuning PID Controller.

Auto Tuning PID Controller for Multi-tank Process

International Journal of Computer Applications, 2013

In process industries, control of liquid level in the process tank is important and complicated issues. In this work, authors have represented a case study involving mathematical modeling, system identification, and controller design of a three tank conical interacting level system (TTCILS). A nonlinear tank is identified mathematically and an auto tuning method of PID controller is implemented in simulation environment. The effectiveness of the control scheme has been studied on a TTCILS process in MATLAB environment.

Control of a Coupled Tank System Using Pi Controller with Advanced Control Methods

Jurnal Teknologi, 2016

The liquid level control in tanks and flow control between cascaded or coupled tanks are the basic control problems exist in process industries nowadays. Liquids are to be pumped, stored or mixed in tanks for various types of chemical processes and all these require essential control and regulation of flow and liquid level. In this paper, different types of tuning methods are proposed for Proportional-Integral (PI) controller and are further improved with integration of Advanced Process Control (APC) method such as feedforward and gain scheduling to essentially control the liquid level in Tank 2 of a coupled tank system. The MATLAB/Simulink tools are used to design PI controller using pole-placement, Ciancone, Cohen Coon and modified Ziegler-Nichols tuning method with Cohen Coon tuning method found to have a better performance. Advanced process control such as feedforward-plus-PI, Gain Scheduling (GS) based PI, Internal Model Control (IMC) based PI, feedforward-plus-GS-based PI and...

Design of Centralized PI Controller for Interacting Conical Tank System

Background/Objectives: The objective of this paper is to design centralised controller for liquid level in the two interacting conical tank system. Methods/Statistical analysis: Two Centralised Proportional and Integral (PI) controller tuning method (Davison method and Tanttu and Liestehto method) are used for simulation and implemented in real time process. Findings: Centralised PI controller reduces the interaction between the two interacting conical tank and improves the system performance. The performances are compared in terms of Integral Square Error (ISE) and Peak Overshoot. It is observed that Tanttu and Liestehto method produces better response than Davison method. Applications/ Improvements: Level control in two interacting conical tank is used in chemical industries and water treatment plants.

Performance Analysis of a Nonlinear Coupled-Tank System Using PI Controller

Universal Journal of Control and Automation, 2017

In the process industry many of the control applications deal with liquid level, flow, temperature and pressure processes. This paper presents the approach of modeling and controller design of liquid level control system for a nonlinear Coupled-Tank System. First of all, the mathematical equations for the nonlinear system are explored. And then, proportional plus integral (PI) controller is designed to control the level of the second tank for the nonlinear model, through variable manipulation of water pump in the first tank. The simulation study is done using MATLAB and the performance analysis in time domain of the controller is identified. In addition, ITAE criterion is used to evaluate the controller performance. Finally, the simulation results indicate that the controller work very well and the proposed controller has the ability to reject the effect of the disturbance.

Development of PID Controller for Controlling Desired Level of Coupled Tank System

The industrial application of Coupled Tank System (CTS) are widely used especially in chemical process industries. The overall process need liquids to be pumped, stored in the tank and pumped again to another tank for certain desired level. Nevertheless, the level of liquid in tank need to be controlled and flow between two tanks must be regulated. This paper presents development of Proportional-Integral-Derivative (PID) controller for controlling the desired liquid level of the CTS. Various conventional techniques of PID tuning method will be tested in order to obtain the PID controller parameters. Simulation is conducted within MATLAB environment to verify the performances of the system in terms of Rise Time (Ts), Settling Time (Ts), Steady State Error (SSE) and Overshoot (OS). Four techniques which are trial and error method, auto-tuning method, Ziegler-Nichols (Z-N) method and Cohen-Coon (C-C) method will be implemented and all the performance results will be analyzed. It has been demonstrated that performances of CTS can be improved with appropriate technique of PID tuning methods.

Illustrate the effect of value of P,I,D in a PID controller for a four Tank process

The liquid level accurate control of a four water tank system has become a research focus due to the nonlinear process and multiple variables. this paper deals with the use of computer simulation and simulate environments in a software which illustrates real-world applications of fundamental control principles. The goals of this paper can be summarized as follows: 1) Introduction and the practice of control engineering principles. 2) Show using a simple and challenging example -the four tank process-as many features of multivariable control as possible. 3) Encourage the students promoting an active attitude using problem-based learning via open-ended control problems. 4) Investigation of PID controller on a four Tank process and changing value of P, I, D and effect of these changes.

Modeling and Controller Design for a Coupled-Tank Liquid Level System: Analysis & Comparison

penerbit.utm.my

The system under investigation is a coupled-tank apparatus which is a laboratory bench top emulation of a common process in industrial control. The basic control principle of the coupled-tank system is to maintain a constant level of the liquid in the tank when there is an inflow and outflow of water in the tank and outflow of water out of the tank respectively. Classification of this system using system identification technique involved the transient response analysis, the pseudorandom binary sequence (PRBS) analysis and the least square method. The main objective of this project is to determine the mathematical model of a coupled-tank system using these techniques. It follows by designing a controller consists of a PID and a Fuzzy Logic controllers for the system. At the final stage of this project, the usage of both controllers in industrial applications is compared and analyzed.

Development of an interacting tank system for the study of advanced process control strategies

38th Midwest Symposium on Circuits and Systems. Proceedings, 1996

This paper presents the design of an Interacting Tank System for the study and evaluation of advanced process umtrol strategies. The system dynamic model and implementation details are also presented. The system has been specially designed with characteristics and problems inherent to the actual process industry environment. The controlled variables are the level and the output flowate. Experimental results using the implemented Interactmg Tank System are briefly discwsed.

Two Degree of Freedom PID Controller for Quadruple Tank System

2015

This work presents an overview of designing and tuning of 2 DOF PI and PID controller for single and two tank interacting as well as non-interacting system. Transfer function of the plant i.e. single tank system and two tank non-interacting as well as interacting system calculated practically, following a mathematical model approach. Conventional PI and PID controller has a limitation when it is tested for set point tracking along with disturbance rejection. We can get a good set point tracking response and good disturbance rejection response separately but difficult to get simultaneously.2 DOF PI and PID controller overcome this disadvantage; it simultaneously provides a good set point tracking as well as good disturbance rejection response. Controller parameters calculated through the Ziegler Nichols’ open loop method. Controller action tested practically on the quadruple tank system using National Instruments’ LabVIEW and compared with the simulation results. Set point and trends...