Book ChapterDOI
Integrating stiction diagnosis and stiction compensation in process control valves
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In this paper, an optimization based approach for stiction compensation much in the sprit of predictive control strategies is proposed, which can mitigate the non-linearity of valve nonlinearity to a large extent.Abstract:
Limit cycles caused due to valve non-linearity such as stiction can be eliminated with proper valve maintenance Since valve maintenance is usually scheduled during production stops and with production stops scheduled typically once every six months to three years, the loss of product quality and energy loss during this intermediate period can be quite high Stiction compensation algorithms can mitigate this problem to a large extent In this paper, an optimization based approach for stiction compensation much in the sprit of predictive control strategies is proposedread more
Citations
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Journal ArticleDOI
Modeling, Detection and Quantification, and Compensation of Stiction in Control Loops: The State of the Art
TL;DR: In this paper, a survey of stiction modeling, detection, and compensation is presented, encompassing main research directions and significant contributions that have been reported in the literature, showing their strengths and weaknesses.
Journal ArticleDOI
A Model Free Approach for Online Stiction Compensation
TL;DR: In this article, a novel stiction compensation scheme is developed which reduces both oscillation amplitude and frequency, obtains good set point tracking and disturbance rejection, and yet requires minimal information about the process and is simple to implement online.
A New Methodology to Compensate Stiction in Pneumatic Control Valves
S. Sivagamasundari,D. Sivakumar +1 more
TL;DR: In this article, a model-based compensation approach for the stiction nonlinearity present in control valves is proposed, which is validated by both simulation and laboratory data. But, as shutting down the process to isolate the faulty valve for maintenance purposes is not economical, this solution does not count as the primary one.
Journal ArticleDOI
Actuator stiction compensation via variable amplitude pulses.
TL;DR: A novel model free stiction compensation scheme is developed which eliminates the oscillations and also reduces valve movement, allowing good setpoint tracking and disturbance rejection and ability to cope with uncertainty in friction.
Proceedings ArticleDOI
Techniques for stiction diagnosis and compensation in process control loops
TL;DR: In this article, the authors deal with the development of stiction diagnosis and compensation algorithms for non-invasive control valve stiction detection from routine operating data, which is an important problem that needs to be solved.
References
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Journal ArticleDOI
A survey of models, analysis tools and compensation methods for the control of machines with friction
TL;DR: This survey is the first to bring to the attention of the controls community the important contributions from the tribology, lubrication and physics literatures, and provides a set of models and tools for friction compensation which will be of value to both research and application engineers.
Journal ArticleDOI
A friction compensator for pneumatic control valves
TL;DR: In this article, a procedure that compensates for static friction (stiction) in pneumatic control valves is presented, where the compensation is obtained by adding pulses to the control signal.
Journal ArticleDOI
Control Loop Performance Assessment. 2. Hammerstein Model Approach for Stiction Diagnosis
TL;DR: In this work, a new identification procedure for Hammerstein systems that supports stiction diagnosis is proposed and an optimization approach is used to jointly identify the process model and the stiction parameter.
Journal ArticleDOI
Friction compensation for a process control valve
Arkan Kayihan,Francis J. Doyle +1 more
TL;DR: In this paper, a nonlinear locally intelligent actuator design is developed to control a valve independently of the distributed control system, which is implemented through the direct synthesis of a sliding-stem valve model within a non-linear structure.
Journal ArticleDOI
Stiction Compensation in Process Control Loops: A Framework for Integrating Stiction Measure and Compensation
TL;DR: In this article, a framework that utilizes a stiction measure for effective stiction compensation in process control valves is proposed for the first time, where the choice of the knocker parameters can be automated based on the stiction severity exhibited by the loop.