Method and controller for controlling a continuous process
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United States of America
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Jan 7, 2025
Grant Date -
May 10, 2018
app pub date -
Nov 10, 2017
filing date -
Nov 10, 2017
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Abstract
A method and controller compensates control variables of a continuous process prior to the control variables being input to the controller/control matrix to at least partially mask the effect of a selected disturbance or a manipulated variable on that controlled variable to the controller. The controlled variable(s) has been chosen to be an inference of a desired underlying or related variable which is not directly measurable. The selected disturbance to be masked is one which does affect the (measured) controlled variable, but not the underlying desired variable. By at least partially masking the effect to all intents and purposes the controller is unaware of the effect of the selected disturbance on the controlled variable and therefore, for a fully masked disturbance, does not make any adjustment to a manipulated variable associated with the selected disturbance which would unnecessarily alter the underlying desired variable. In the event of a partially masked disturbance there will be some modification of the manipulated variable in comparison to that which would occur in the absence of the method.
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