Review and comparison of techniques of analysis of valve stiction: From modeling to smart diagnosis

The paper starts with an illustration of basic aspects of the phenomenon of valve stiction, with description of its origin and physical mechanisms, and details about the effects on control variables. Then, different models of valve stiction are examined, and traditional detection techniques and smart diagnosis approaches, based on additional measurements, are presented. Then, the paper illustrates identification and quantification methods, compensation techniques, and software packages proposed for control loop performance assessment.