Automatic control loop monitoring and diagnostics

G - Physics – 05 – B

Patent

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Details

G05B 19/406 (2006.01) G05B 19/4063 (2006.01) G05B 23/02 (2006.01)

Patent

CA 2252868

A method of diagnosing a malfunction of a process control system which includes at least one closed loop control loop comprising measuring a histogram of tracking error of the control loop, determining distortion of the tracking error relative to a Gaussian distribution, and indicating a malfunction in the process in the event a deviation from the Gaussian distribution of the tracking error exceeds predetermined limits.

L'invention porte sur une méthode permettant de diagnostiquer un dysfonctionnement dans un système de commande de processus comportant au moins une boucle de régulation à boucle fermée. La méthode consiste à mesurer un histogramme d'erreur de poursuite de la boucle de régulation, à établir la distorsion de l'erreur de poursuite relativement à une distribution gaussienne et à indiquer un dysfonctionnement survenant dans le processus dans le cas où un écart par rapport à la distribution gaussienne de l'erreur de poursuite excéderait des limites prédéterminées.

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