The presence of non-linearities, such as stiction and deadband, places limits on the
performance of control valves. Indeed, in the process industries, stiction is the most common …

The importance of evaluating valve conditions and detecting the onset of possible
malfunctions is recognized as a key issue in control performance monitoring, as they may …

Eight different models to represent the effect of friction in control valves are presented: four
models based on physical principles and four empirical ones. The physical models, both …

Valves, susceptible to malfunctions in natural gas transmission control, play a critical role
and require vigilant maintenance within pipeline companies. Despite traditional preventive …

In recent years, significant research has been performed on control loop oscillation
diagnosis; there are still many unresolved issues such as indecisive or wrong diagnostics for …

Satisfactory control loop performance has always been a vital objective in process industries
for economic reasons. However, unsatisfactory performance may prevail, of which valve …

Detection and diagnosis of faults in cement industry is of great practical significance and
paramount importance for the safe operation of the plant. In this paper, the design and …

Despite numerous studies on modeling and detection of static friction (stiction) in control
valves, compensation methods for this problem are limited. In this work, a stiction …

The concept of maintaining or enhancing chemical process safety encompasses a broad set
of considerations which stem from management/company culture, operator procedures, and …

In the process industry, it is crucial to ensure safety, high product quality, strict environmental
compliance, and optimum economics. Among other important factors, this calls for high …