Fractional Order Control and Comparative Analysis of a Hybrid System

Abstract

Abstract Modeling of level process in various tanks and vessels is one of the most common problems in the process industry. In this paper, system identification process is attempted for CSTH tank process. The CSTH tank process is a classic example of a highly nonlinear system. For nonlinear systems, System identification provides a better alternative to find their system transfer function. First principle modeling of level process is done with so much of assumption. System identification procedure gives accurate model. Inflow rate is taken as the input data and process level is taken as the output for CSTH tank. Collected data is fitted to transfer function model set. The simulation is performed in the MATLAB environment using System Identification coding and then worked on FOPID control toolbox. We have found practically the model of the CSTH tank using the MATLAB environment which gives the results almost identical to the ideal model of the plant. The system identification process is used here to identify the nature of the system using the inputs and the outputs available. After this identification process best control can be chosen with a comparative analysis and then the controller can be implemented.