Analysis and control of processes

Abstract

In any processes industry, the main and primary variable and processes that needs to be controlled are temperature, level, pressure and flow. This project deals with control and analysis of the first three. Before beginning with any kind of analysis of a system, it needs to be mathematically modelled. Laplace transfer and linearization forms the two most important part of this modelling which is carried out in each and every system considered in this project work. Also higher-order systems can be distinguished on the basis of their non-interacting or interacting nature. In level process, firstly, a single-tank system is considered where the objective is to maintain the process liquid at a desired level or change it at a pre-determined rate by controlling the manipulated variables, firstly one at a time and then all of them being controlled simultaneously at the same time. This is a non-interacting system. Next, a two-tank system is analysed where the objective is two maintain the process liquid in the second tank by controlling the manipulated variables which affect the first tank. Here two types of system are considered; interacting and non-interacting. Following this a three-tank, non-interacting system is modelled where the level of the third tank is maintained by manipulated variables affecting the first tank. The responses curves of these systems to various forcing functions such as step, sinusoidal and ramp are generated analysed. In thermal process, the work begins with modelling an adiabatic process followed by a non-adiabatic process. The dynamics of the process is understood by analysing the feature of the solution. The control objective is to maintain the process fluid temperature at the desired value by controlling the manipulated variables (such as inlet flow, coolant temperature etc.). The response curves of these systems are generated to different forcing functions.