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Double-command feedforward-feedback control of a nonlinear plant

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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 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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Authors and Affiliations

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

    Morteza Mohammadzaheri & Lei Chen

Authors
  1. Morteza Mohammadzaheri
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  2. Lei Chen
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Correspondence to Morteza Mohammadzaheri.

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Mohammadzaheri, M., Chen, L. Double-command feedforward-feedback control of a nonlinear plant. Korean J. Chem. Eng. 27, 1372–1376 (2010). https://doi.org/10.1007/s11814-010-0258-8

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  • DOI: https://doi.org/10.1007/s11814-010-0258-8

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