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Advanced Regulatory Control by David W. Spitzer

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Feedforward Action

Feedforward action is defined herein to be the utilization of process interaction to provide feedforward control without feedforward measurements per se. This differs from feedforward control where process measurements allow the control system to respond to process disturbances before the effects of the measured disturbances affect the controlled variable. Applying feedforward action requires an in-depth (but not necessarily mathematical) understanding of the process, process equipment, and their dynamics. Depending on the application, implementation of feedforward action could be described as the judicious selection of the process measurements in a cascade control strategy, or perhaps the careful selection of the final control ...

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