Method of predicting overshoot in a control system response
First Claim
Patent Images
1. In a process control system, the method of suppressing the overshoot of a process variable beyond a predetermined process value setpoint, comprising the steps of:
- predicting said overshoot by observing the waveform associated with said process variable;
predicting the overshoot will occur during the rise of the process variable waveform;
the lack of an overshoot process variable approaches the setpoint exponentially;
the presence of an overshoot of the process variable approaches the setpoint linearly;
said observation of said waveform associated with said process variable is made without regard to time scale or, in the alternative, to amplitude scale;
enabling said system to take corrective action to reduce or, in the alternative, to eliminate said overshoot;
utilizing a fuzzy logic module with a proportional integral derivative control to take said corrective action of said process variable.
1 Assignment
0 Petitions
Accused Products
Abstract
A process control system including a method of suppressing overshoot of a process variable beyond the process value setpoint by predicting the overshoot by observing a waveform associated with the process variable, observing the waveform associated with the process variable, without regard to time scale or to amplitude scale, taking corrective action to reduce or eliminate said overshoot by utilizing a fuzzy logic module with a proportional integral derivative control to take corrective action of the process variable.
126 Citations
8 Claims
-
1. In a process control system, the method of suppressing the overshoot of a process variable beyond a predetermined process value setpoint, comprising the steps of:
-
predicting said overshoot by observing the waveform associated with said process variable; predicting the overshoot will occur during the rise of the process variable waveform; the lack of an overshoot process variable approaches the setpoint exponentially; the presence of an overshoot of the process variable approaches the setpoint linearly; said observation of said waveform associated with said process variable is made without regard to time scale or, in the alternative, to amplitude scale; enabling said system to take corrective action to reduce or, in the alternative, to eliminate said overshoot; utilizing a fuzzy logic module with a proportional integral derivative control to take said corrective action of said process variable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification