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Received December 10, 2009
Accepted January 24, 2010
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Double-command feedforward-feedback control of a nonlinear plant
Mechanical Engineering School, The University of Adelaide, SA5005, Australia
morteza.mohammadzaheri@adelaide.edu.au
Korean Journal of Chemical Engineering, September 2010, 27(5), 1372-1376(5), 10.1007/s11814-010-0258-8
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Abstract
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_x000D_
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.
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