Double-command feedforward-feedback control of a nonlinear plant

Morteza Mohammadzaheri; Lei Chen

Korean Journal of Chemical Engineering, Vol.27, No.5, 1372-1376, September, 2010

DOI10.1007/s11814-010-0258-8 Export Citation

Double-command feedforward-feedback control of a nonlinear plant

Morteza Mohammadzaheri^†, and Lei Chen

Mechanical Engineering School, The University of Adelaide, SA5005, Australia

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A design approach is proposed for feedforward-feedback control systems. The basis of the proposed approach is a steady state control law which maintains the desired control output of the system and is employed as the feedforward controller. With this feedforward controller, for a wide class of systems, the stability of the control system is proved if the feedback controller is a gain with an arbitrarily high value; that is, the only limit for the feedback (transient) control command is the actuator’s practical limit. Moreover, in continuous domain, there will be no overshoot. In this article, the proposed method has been applied to a catalytic stirred tank reactor (CSTR) to control the output concentration through adjusting the flow of two valves simultaneously and resulted in an excellent control response.

Keywords:Process Control;Feedforward;Lyapunov;CSTR;Control Equilibrium Point

[References]

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Mohammadzaheri M, Chen C, Anti-overshoot Control of Model Helicopter’s Yaw Angle with Combination of Fuzzy Controller and Fuzzy Brake, International Conference on Intelligence and Advance Systems, Kuala Lumpur, Malaysia, 25-28 November (2007)
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Mohammadzaheri M, Chen L, Korean J. Chem. Eng., 27(1), 19 (2010)
Slotine J, Li W, Applied Nonlinear Control, Prentice Hall, Englewood-Cliffs, New Jersey, U.S. (1991)

[1] Tuglie ED, Iannone SM, Torelli F, Electric Power Systems Res., 78, 382 (2008)

[2] Marchetti G, Barolo M, Jovanovic L, Zisser H, Seborg DE, J. Process Control, 18(2), 149 (2008)

[3] Mohammadzaheri M, Chen C, Anti-overshoot Control of Model Helicopter’s Yaw Angle with Combination of Fuzzy Controller and Fuzzy Brake, International Conference on Intelligence and Advance Systems, Kuala Lumpur, Malaysia, 25-28 November (2007)

[4] Mohammazaheri M, Chen L, Intelligent Predictive Control of Model Helicopter’s Yaw Angle, Asian J. Control., 12(6), 1 (2010)

[5] Petersen CD, Fraanje R, Cazzolato BS, Zander AC, Hansen CH, Mechanical Systems and Signal Processing., 22, 490 (2008)

[6] Yan M, Shiu Y, International J. Machine Tools & Manufacture,., 48, 388 (2008)

[7] Braganza D, Dawson DM, Walker ID, Nitendra N, IEEE Transactions on Robotics., 23, 1270 (2007)

[8] Patre PM, MacKunis W, Makkar C, Dixon WE, IEEE Transactions on Control Systems Technology., 16, 373 (2008)

[9] Tang G, Sun H, Pang H, Progress in Natural Science., 18, 225 (2008)

[10] Mohammadzaheri M, Chen L, Korean J. Chem. Eng., 27(1), 19 (2010)

[11] Slotine J, Li W, Applied Nonlinear Control, Prentice Hall, Englewood-Cliffs, New Jersey, U.S. (1991)