DocumentCode :
2619230
Title :
Multivariable robust optimal PID controller design for a non-minimum phase boiler system using loop transfer recovery technique
Author :
Zargarzadeh, H. ; Motlagh, M. R Jahed ; Arefi, M.M.
Author_Institution :
Electr. Eng. Dept., Iran Univ. of Sci. & Technol., Tehran
fYear :
2008
fDate :
25-27 June 2008
Firstpage :
1520
Lastpage :
1525
Abstract :
LQG/Loop Transfer Recovery (LQG/LTR) technique based on Kalman filter as observer, has some difficulties in facing with non-minimum phase systems. The main problem is that the observer becomes unstable when the compensator recovers the target loop asymptotically. In this paper, we propose an optimal robust recoverable target loops for a boiler system. Using asymptotic time-scale eigenstructure assignment ATEA algorithm a stable observer is designed that makes the target loop recovered. Then, the controller is reduced to a PID controller for experimental purposes. Recoverability of target loop under controller reduction has been analyzed. Numerical results of two controllers are given in time and frequency domain. Comparing with a similar work based on loop-shaping Hinfin approach, LQG/LTR controller shows improvements in energy consumption and time responses.
Keywords :
Hinfin control; Kalman filters; boilers; control system synthesis; eigenstructure assignment; linear quadratic Gaussian control; observers; robust control; three-term control; Kalman filter; PID controller; asymptotic time-scale eigenstructure assignment; compensator; controller design; loop transfer recovery technique; loop-shaping Hinfin approach; multivariable controller; nonminimum phase boiler system; observer stability; optimal controller; recoverable target loop; robust controller; Algorithm design and analysis; Automatic control; Boilers; Control systems; Frequency domain analysis; Optimal control; Robust control; Robustness; Three-term control; Transfer functions; LQG/Loop transfer recovery; Non-minimum Phase System; Optimal Robust Control; PID controller; Power plant boiler;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control and Automation, 2008 16th Mediterranean Conference on
Conference_Location :
Ajaccio
Print_ISBN :
978-1-4244-2504-4
Electronic_ISBN :
978-1-4244-2505-1
Type :
conf
DOI :
10.1109/MED.2008.4602170
Filename :
4602170
Link To Document :
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