Systems and methods for detecting a control loop interaction

摘要

A system for detecting a control loop interaction between two or more control loops. The system includes a processing circuit configured to store a history of detected loop disturbances for a plurality of control loops. The processing circuit is also configured to compute a measure of interaction between control loops using the history of detected loop disturbances. The processing circuit is further configured to determine whether a loop interaction exists based on the computed measure of interaction.

主权项

1. A computerized method for detecting a control loop interaction, the method comprising:
receiving an indication of a control loop disturbance detected by a controller for a first control loop, wherein the control loop disturbance is a change detected in the first control loop that exceeds a disturbance detection threshold; storing, in a memory, a history of detected loop disturbances for the first control loop and at least a second control loop, wherein each of the detected loop disturbances is stored with a time parameter indicating a time at which the disturbance is detected; using the history of detected loop disturbances to assign each of a plurality of time periods to one of categories (a), (b), (c), and (d) according to whether a disturbance is detected or not detected during the time period in each of the first and second control loops, wherein a time period is assigned to:
category (a) if a disturbance is detected in the first control loop and not detected in the second control loop during the time period,category (b) if a disturbance is detected in the second control loop and not detected in the first control loop during the time period,category (c) if a disturbance is detected in both the first control loop and the second control loop during the time period, andcategory (d) if a disturbance is detected in neither the first control loop nor the second control loop during the time period; generating and storing a set of variables that indicate a quantity of the time periods assigned to each of categories (a)-(d); calculating, by a processor, a measure of interaction between the first and second control loops using the set of variables, the measure of interaction indicating a statistical correlation between the times at which disturbances are detected in the first control loop and the times at which disturbances are detected in the second control loop; determining whether a loop interaction exists between the first and second control loops based in part on the measure of interaction; and using a communications interface to transmit data representing the result of the determination.