Title :
LMI based controller synthesis of an uncertain three tank system
Author :
Iqbal, M. ; Bhatti, A.I. ; Iqbal, S. ; Butt, Q.R.
Author_Institution :
Center for Adv. Studies in Eng., Islamabad, Pakistan
Abstract :
Three tank system can be adapted to emulate many systems in process and aerospace industry. This paper presents synthesis of LMI based H∞ controller for uncertain three tank system. Uncertainties in parameters can arise due to imperfect knowledge of physical parametric values or from variations of these parameters during operation. A linearized affine dynamical model is derived with uncertain flow coefficients as varying parameters. H∞ controller is designed with multi-objective approach using derived affine model. Simulations are also carried out to assess the performance of controller against parametric variations/uncertainties simultaneously in the presence of input disturbances. The performance of designed controllers is compared with PI controller.
Keywords :
H∞ control; PI control; control system synthesis; linear matrix inequalities; linear systems; nonlinear control systems; uncertain systems; LMI based H∞ controller; LMI based controller synthesis; PI controller; aerospace industry; controller design; linearized affine dynamical model; multiobjective approach; nonlinear control; parameter uncertainty; parametric variation; physical parametric value; uncertain flow coefficient; uncertain three tank system; H∞ robust control; LMI´s; Three tank system; affine parameterization; parameter uncertainty;
Conference_Titel :
Applied Sciences and Technology (IBCAST), 2009 6th International Bhurban Conference on
Conference_Location :
Islamabad
Print_ISBN :
978-1-4244-8650-2
Electronic_ISBN :
978-969-8741-07-5
