Towards an Expert Multivariable Controller

Abstract Multivariable control techniques have not been as widely adopted in process plants as their developers had hoped and expected. This can be attributed to the dependency on an accurate process model and their inability to handle effectively abnormal conditions. To safeguard against such shortcomings an Expert Multivariable Controller (EMC) is proposed to make the control of multivariable processes as effective and fail-safe as possible. It diagnoses process malfunctions and makes appropriate structural changes to the controller structure, control algorithms and control parameters in order to achieve as tight control of the process as possible. The expert controller uses plant-independent control systems knowledge and plan dependent knowledge. A preliminary version of this controller is demonstrated in the control of a batch PVC polymerization reactor.

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