A simple method for detecting valve stiction in oscillating control loops

Abstract This paper presents a simple and new method for detecting valve stiction in an oscillating control loop. The method is based on the calculation of areas before and after the peak of an oscillating signal. The proposed method is intuitive, requires very little computational effort, and is easy to implement online. Analytical results are derived to show the theoretical basis of the new method and field results are presented to show its effectiveness on real world control loops.

[1]  Alexander Horch.  A simple method for detection of stiction in control valves , 1999 .

[2]  K. Åström,et al.  Revisiting the Ziegler-Nichols step response method for PID control , 2004 .

[3]  Carlos Canudas de Wit,et al.  A survey of models, analysis tools and compensation methods for the control of machines with friction , 1994, Autom..

[4]  Fredrik Gustafsson,et al.  A segmentation‐based method for detection of stiction in control valves , 2003 .

[5]  Thomas F. Edgar,et al.  Process Dynamics and Control , 1989 .

[6]  Alexander Horch.  Condition Monitoring of Control Loops , 2000 .

[7]  Sirish L. Shah,et al.  Modelling valve stiction , 2005 .

[8]  Dean Karnopp,et al.  Computer simulation of stick-slip friction in mechanical dynamic systems , 1985 .

[9]  T. Miao,et al.  Automatic detection of excessively oscillatory feedback control loops , 1999, Proceedings of the 1999 IEEE International Conference on Control Applications (Cat. No.99CH36328).

[10]  Nina F. Thornhill,et al.  A Data-Driven Model for Valve Stiction , 2004 .

[11]  T. Hägglund.  A friction compensator for pneumatic control valves , 2002 .

[12]  Guy A. Dumont,et al.  Detection and diagnosis of oscillations in control loops , 1996, Proceedings of 35th IEEE Conference on Decision and Control.

[13]  Karl Johan Åström,et al.  PID Controllers: Theory, Design, and Tuning , 1995 .

[14]  Nina F. Thornhill,et al.  Diagnosis of poor control-loop performance using higher-order statistics , 2004, Autom..

[15]  Alf Isaksson,et al.  A Method for Detection of Stiction in Control Valves , 1998 .

[16]  Tore Hägglund,et al.  Detection and Diagnosis of Oscillation in Control Loops , 1997 .

[17]  Aidan O'Dwyer,et al.  Handbook of PI and PID controller tuning rules , 2003 .