Output feedback control of nonminimum-phase nonlinear processes

Abstract

This work concerns the development of a general framework for the analysis and output feedback control of open-loop stable nonminimum-phase nonlinear processes. A Smith-type abstract operator structure is introduced, allowing the reduction of the controller synthesis problem for nonminimum-phase processes to the one for minimum-phase processes. State-space methods are used to derive a reduced-order output feedback controller that induces a desired input/output behavior for processes with unstable inverse dynamics and deadtime. The underlying structure of the reduced-order controller is also identified and studied. Finally, an example from a class of chemical reaction systems with nonminimumphase characteristics is used for evaluating the performance and robustness of the developed control method.

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“…For details see [16]. The presence of deadtime in the system makes the control problem more challenging.…”

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“…and the values of the various process parameters and steady-state operating condition are given in Table 1 [24].…”

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