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PERFORMANCE MONITORING OF PI CONTROLLERS USING A SYNTHETIC GRADIENT OF A QUADRATIC COST FUNCTION
Ari Ingimundarson
Department of Automatic Control
Lund Institute of Technology
Box 118, S-221 00 Lund
Sweden
ari@control.lth.se
The paper shows how a synthetic gradient of a quadratic cost function can be used to monitor performance. The method requires a model of the closed loop system. In the current paper this is obtained from the recommended tuning rule. The tuning rule requires a simple model of the process. The method is non-invasive, only closed loop data from normal operation is used. By monitoring the gradient, information about the state of the loop is obtained.
Keywords: performance monitoring, PID control
Session slot T-Fr-M21: Posters of Mining, Power Systems and Fault Detection/Area code 7e : Fault Detection, Supervision and Safety of Technical Processes
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