Experimental Validation of a Multi Model PI Controller for a Non Linear Hybrid System in LabVIEW

Abstract: In this paper a real time Single Spherical Tank Liquid Level System (SSTLLS) has been chosen for investigation. This paper describes the design and development of a Multi Model PI Controller (MMPIC) using classical controller tuning techniques for a single spherical nonlinear tank system. System identification of these different regions of nonlinear process are done using black box modeling, which isidentified to be nonlinear and approximated to be a First Order Plus Dead Time (FOPDT) model. Aproportional and integral controller is designed using LabVIEW and Chen-Hrones-Reswick (CHR),Zhuang-Atherton (ZA), and Skogestad’s Internal Model Controller (SIMC) tuning methods are implementedin real time. The paper provides the details about the data acquisition unit, shows the implementation of the controller and comparision of the results of PI tuning methods used for an MMPI Controller.
Keywords: Graphical User Interface (GUI), PI Controller, Chen-Hrones-Reswick (CHR), Zhuang-Atherton (ZA), and Skogestad’s Internal Model Controller (SIMC), LabVIEW
Author: M.Kalyan Chakravarthi, Nithya Venkatesan
Journal Code: jptkomputergg150075

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