Model Predictive Control (MPC) Applied To Coupled Tank Liquid Level System

— Coupled Tank system used for liquid level control is a model of plant that has usually been used in industries especially chemical process industries. Level control is also very important for mixing reactant process. This survey paper tries to presents in a systemic way an approach predictive control strategy for a system that is similar to the process and is represented by two liquid tanks. This system of coupled Tank is one of the most commonly available systems representing a coupled Multiple Input Multiple Output (MIMO) system. With 2 inputs and 2 outputs, it is the most primitive form of a coupled multivariable system. Therefor the basic concept of how the coupled tanks system works is by using a numerical system which it operates with a flow control valve FCV as main control of the level of liquid in one tank or both tanks. For this paper, MPC algorithm control is used which will be developed below. And it is focuses on the design and modelling for coupled tanks system. The steps followed for the design of the controller are: Developing a state space system model for the coupled tank system then design an MPC controller for the developed system model. And study the effect of the disturbance on measured level output. Note that the implementation Model Predictive Controller on flow controller valve in a Coupled Tank liquid level system is one of the new methods of controlling liquid level. 1. INTRODUCTION ODEL predictive control (MPC) has a long history in the field of control engineering. It is one of the few areas that has received ongoing interest from researchers in both the industrial and academic communities.The general design objective of model predictive control is to compute a trajectory of a future manipulated variable input to optimize the future behavior of the plant output. The optimization is performed within a limited time window by giving plant information at the start of the time window. Model predictive control, MPC, is a widely used industrial technique for advanced multivariable control. For processes with strong interaction between different signals MPC can offer substantial performance improvement compared with traditional single-input single-output control strategies. Model predictive control has been used for several decades, and has been accepted as an important tool in many process industry applications. The paper is organized as follows: Section 2 gives an overview of system modeling; section 3 describes briefly …