Patent ID: 8428755
Filing Date: 2013-04-23
Classification: G05B

Abstract:
1. A device for adjusting a signal normally provided by a proportional plus integral (PI) feedback control module to a process system, the device comprising: an input interface configured to receive the signal from the PI feedback control module; a processing circuit configured to modify the signal of the PI feedback control module by exaggerating the rate of change of the signal, wherein the processing circuit is configured to select a time constant for the modification based on the time constant of the process system; and an output interface for providing control signals to the process system; wherein the processing circuit is further configured to provide the modified signal to the output interface; and wherein the processing circuit is configured to periodically evaluate the time constant of the process system and to update the time constant for the modification based on the evaluation of the process system's time constant; wherein the exaggeration is based on forward-looking predictions configured to compensate for dynamics of the process system; wherein the processing circuit is configured to make the forward-looking predictions based on a calculated slope of the output of the PI feedback control module.