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
