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Received April 23, 2011
Accepted September 15, 2011
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Input/output linearization with a two-degree-of-freedom scheme for uncertain nonlinear processes
Center of Excellence for Petroleum, Petrochemicals, and Advanced Materials, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
fengcnp@ku.ac.th
Korean Journal of Chemical Engineering, June 2012, 29(6), 716-723(8), 10.1007/s11814-011-0243-x
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Abstract
This work presents a new method to control processes with unmeasured input disturbance and random noise parametric uncertainty. The developed method takes advantage of a two-degree-of-freedom control structure in which setpoint regulation and load disturbance rejection are integrated in the controller synthesis. Input/output linearization is selected to provide the setpoint tracking ability. For disturbance rejection, the high-gain technique is used to compensate for the effect of the uncertainty. The control performance of the method is evaluated through numerical simulation of continuous stirred tank reactors with uncertainty. The simulation results show that both unmeasured disturbance and parametric uncertainty can be effectively compensated for by the proposed control method.
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References
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Wu KL, Yu CC, Cheng YC, J. Process Control, 11(3), 311 (2001)
Tan W, ISA T., 49, 311 (2010)
Liu T, Zhang WD, Gu DY, J. Process Control, 15(5), 559 (2005)
Liu T, Zhang WD, Gao F, Ind. Eng. Chem. Res., 46(20), 6546 (2007)
Liu T, Gu DY, Zhang WD, J. Process Control, 15(2), 159 (2005)
Shamsuzzoha M, Moonyong Lee M, Korean J. Chem. Eng., 25(4), 637 (2008)
Chen J, Chou KT, Korean J. Chem. Eng., 26(6), 1512 (2009)
Wright RA, Kravaris C, Chem. Eng. Sci., 60(15), 4323 (2005)
Wright RA, Kravaris C, Chem. Eng. Sci., 61(14), 4676 (2006)
Slotine JJE, Li W, Applied nonlinear control, Prentice Hall, Englewood Cliffs, NJ (1991)
Henson MA, Seborg W, Nonlinear process control, Prentice Hall, Upper Saddle River, NJ (1996)
Aufderheide B, Bequette BW, Comput. Chem. Eng., 27(8-9), 1079 (2003)
Kanter JR, Soroush M, Seiders WD, Ind. Eng. Chem. Res., 40(9), 2069 (2001)
Wright RA, Kravaris C, Chem. Eng. Sci., 58(14), 3243 (2003)
