Title :
Multivariable robust control of an approach flow system
Author :
Moudgil, Minisha ; Kumar, Rajesh ; Gaba, Sanjeev
Author_Institution :
Dept. of Instrum. & Control Eng., Graphic Era Univ., Dehradun, India
Abstract :
The objective of this paper is to design a robust controller for the multivariable system having five inputs such as reel speed (U1), thick stock flow rate (U2), ash flow rate(U3), flow rate of retention aid(U4), and ash fraction in thick stock(U5) and two outputs Y1 (bone dry weight) and Y2(bone dry ash weight). The controlled variables are chosen as an ash flow rate (U3) and flow rate of retention Aid (U4) for the approach flow system of a paper making process. The paper includes a mathematical model and presents Linear Quadratic Gaussian (LQG) controller design for the system. The paper concludes that the LQG robust control strategy provides better stability & performance objectives compare to the PID controller in the presence of uncertainty & disturbances.
Keywords :
control system synthesis; flow control; linear quadratic Gaussian control; multivariable control systems; paper making; robust control; uncertain systems; LQG controller design; LQG robust control strategy; approach flow system; ash flow rate; ash fraction; bone dry ash weight; bone dry weight; disturbances; linear quadratic Gaussian controller design; mathematical model; multivariable robust control; paper making process; performance objectives; reel speed; retention aid; robust controller design; stability; thick stock flow rate; uncertainty; Ash; Bones; Kalman filters; MATLAB; Pipelines; Robustness; Approach flow system; Kalman filter; Linear Quadratic Gaussian; state space model;
Conference_Titel :
Industrial Instrumentation and Control (ICIC), 2015 International Conference on
Conference_Location :
Pune
DOI :
10.1109/IIC.2015.7150950
