Title :
Robust static output feedback control of a mixing unit
Author :
Bakosova, Monika ; Puna, Dalibor ; Zavacka, Jana ; Vanekova, Katarina
Author_Institution :
Inst. of Inf. Eng., Slovak Univ. of Technol. in Bratislava, Bratislava, Slovakia
Abstract :
The paper deals with an application of the robust static output feedback control (RSOFC) to a mixing device, where sodium chloride (NaCl) water solution and water are mixed and the solution with required concentration of NaCl is prepared. The mixing unit is modelled as an uncertain polytopic system. Sufficient conditions for stabilization of an uncertain system via static output feedback are given at first and the problem of RSOF controller design is converted to the solution of linear matrix inequalities (LMIs). A simple non-iterative algorithm is used for calculating of LMIs and obtaining robust P, PI or PID controllers. The design procedure guarantees with sufficient conditions the robust quadratic stability and the guaranteed cost. Possibility to use robust static output feedback for control of real processes is demonstrated with results obtained by application of designed robust PI and PID controllers for control of a laboratory mixing device.
Keywords :
PI control; chemical engineering; control system synthesis; feedback; linear matrix inequalities; mixing; robust control; sodium compounds; solutions; three-term control; water; LMI; RSOF controller design; linear matrix inequalities; mixing device; mixing unit; noniterative algorithm; robust PI controllers; robust PID controllers; robust quadratic stability; robust static output feedback control; sodium chloride water solution; sufficient conditions; uncertain polytopic system; Conductivity; Linear matrix inequalities; Output feedback; Process control; Robustness; Uncertainty;
Conference_Titel :
Control Conference (ECC), 2009 European
Conference_Location :
Budapest
Print_ISBN :
978-3-9524173-9-3