Inventors:
Carlos A. Smith - Tampa FL, US
Marco E. Sanjuan - Barranquilla, CO
Assignee:
Universidad del Norte - Barranquilla
University of South Florida - Tampa FL
International Classification:
G06F 17/00
US Classification:
706 47, 706 1, 706 8, 700 42, 700 50
Abstract:
An instability avoidance module that can be implemented in SISO PID control loops to automatically adjust the controller's tuning parameters when undesired oscillatory behavior is monitored. This module is a Fuzzy-based Supervisor composed of a dynamic parameter identification module that operates on-line, and a Fuzzy Inference System (FIS) with fuzzy rules to modify PID tuning. Tests in nonlinear process models were performed, demonstrating that this Fuzzy Supervisor—Type 1 (non-intrusive) provides the PID controller the ability to adapt its tuning to eliminate the observed oscillatory behavior.