Modified PI Controller for Stiction Compensation

@article{Farenzena2010ModifiedPC,
  title={Modified PI Controller for Stiction Compensation},
  author={Marcelo Farenzena and Jorge Ot{\'a}vio Trierweiler},
  journal={IFAC Proceedings Volumes},
  year={2010},
  volume={43},
  pages={799-804}
}
Abstract Stiction is a well known problem of the process performance. Compensate its effect is essential, because most of sticky valves cannot be replaced and they remain working for months or years. The scope of this work is to propose a novel methodology to compensate stiction effects, through the modification of the controller (PI) block in the control loop. The proposed approach is based on the two moves method, however it allows to specify closed loop performances faster than open loop and… Expand
Compensation of control valve stiction through controller tuning
Abstract 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 compensationExpand
An augmented PID control structure to compensate for valve stiction
TLDR
Some PID-based stiction compensation techniques are revised and a new version of stiction-aware PID is illustrated, which requires the estimation of controller output associated with the desired valve position at steady-state and the estimate of valve stiction parameters. Expand
A Revised Technique of Stiction Compensation for Control Valves
Abstract A well-established compensation technique to remove oscillations caused by control valve stiction is the two-moves method. However, the actual versions of this technique present majorExpand
A new stiction compensation method in pneumatic control valves
AbstractIn this paper, a new compensator is designed so as to eliminate the effect of stiction in the control loop. A wellknown stiction compensation method is proposed that reduces variability bothExpand
An online tuned novel nonlinear PI controller for stiction compensation in pneumatic control valves.
TLDR
It has been concluded that the NPIC performed far better than the conventional PI controller for all the case studies and suppressed effectively any stiction induced oscillations. Expand
Valve stiction in control loops — A survey on effective methods of detection and compensation
  • M. A. Daneshwar, N. Noh
  • Engineering
  • 2012 IEEE International Conference on Control System, Computing and Engineering
  • 2012
In many industrial manufacturers, the quality of product heavily depends on control loop performance. Oscillations in control loop decreases performance of their systems. This is made worse with theExpand
Fuzzy I + PD controller for stiction compensation in pneumatic control valve
Stiction in control valves induces oscillations in process variables which consequently bring down product quality and efficiency, quickens wear and tear, and prompts unsteadiness in the plant. InExpand
A SIMPLE METHOD FOR COMPENSATING STICTION NONLINEARITY IN OSCILLATING CONTROL LOOPS
Stiction in control valves is an extremely nonlinear and one of the long-standing problems in a closed loop control system, since the controller will push the control valve to move until theExpand
A novel intelligent controller for combating stiction in pneumatic control valves
Abstract Pneumatic control valve introduces limit cycles in process variables due to stiction nonlinearity. In this paper a novel stiction combating intelligent controller (SCIC) based on fuzzy logicExpand
Controller structure for plants with combined saturation and stiction
TLDR
This approach shows that, for systems affected by a certain class of nonlinearities and saturation at the actuator, the addition of a right inverse of the nonlinearity, in series with the plant, results in a saturation. Expand
...
1
2
...

References

SHOWING 1-10 OF 28 REFERENCES
Stiction Compensation in Process Control Loops: A Framework for Integrating Stiction Measure and Compensation
In this paper, a framework that utilizes a stiction measure for effective stiction compensation in process control valves is proposed for the first time. The performance of a friction compensatorExpand
Approaches for efficient stiction compensation in process control valves
TLDR
Two novel approaches for stiction compensation are proposed: a simple two-move approach and an optimization based approach much in the spirit of predictive control strategies based on a data-driven model for stictions. Expand
A New Unified Approach to Valve Stiction Quantification and Compensation
Satisfactory control loop performance has always been a vital objective in process industries for economic reasons. However, unsatisfactory performance may prevail, of which valve stiction is aExpand
Modelling valve stiction
The presence of nonlinearities, e.g., stiction, and deadband in a control valve limits the control loop performance. Stiction is the most commonly found valve problem in the process industry. InExpand
A Curve Fitting Method for Detecting Valve Stiction in Oscillating Control Loops
TLDR
In this work, data-driven valve stiction models are reviewed, a stiction detection method is proposed based on curve fitting of the output signal of the first integrating component after the valve, and a metric that is called the stiction index (SI) is introduced, based on the proposed method to facilitate the automatic detection of valveStiction. Expand
Control Loop Performance Assessment. 2. Hammerstein Model Approach for Stiction Diagnosis
TLDR
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. Expand
A comparison of techniques for automatic detection of stiction: simulation and application to industrial data
This paper illustrates the effect of stiction in actuators on closed loop performance and the importance of techniques, to be incorporated in the monitoring system, for automatic detection of theExpand
Stiction – definition, modelling, detection and quantification
Abstract Stiction or high static friction is a common problem in spring-diaphragm type control valves, which are widely used in the process industry. Recently, there have been many attempts toExpand
Estimation of valve stiction in control loops using separable least-squares and global search algorithms
Abstract This contribution presents a new procedure for quantifying valve stiction in control loops based on global optimisation. Measurements of the controlled variable (PV) and controller outputExpand
An improved qualitative shape analysis technique for automatic detection of valve stiction in flow control loops
Abstract Valve stiction is a frequent cause of loop performance deterioration and in recent literature many techniques have been proposed for its automatic detection. Yamashita [(2006). An automaticExpand
...
1
2
3
...