Research on control algorithm of intelligent valve positioner based on parameter self-tuning

Qian, Cheng; Liu, Zhifeng; Jiang, Aipeng; Jiang, Enhui; Xiao, Yangjian; Li, Fengxu; Jiang, Jiaji

doi:10.23919/ccc50068.2020.9188582

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…The commonly used pneumatic control valve system consists of three components, including valve positioner, pneumatic diaphragm actuator, and valve body; and the experimental platform is shown in Figure 2. Among them, the valve positioner is the key component of the pneumatic control valve system, which is responsible for the adjustment of the valve position [30,31]. It is mainly composed of the controller, nozzle-flapper-structure electric-pneumatic (I/P) converter and the valve position feedback device.…”

Section: Experimental Equipmentmentioning

confidence: 99%

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A New Control Method for Backlash Error Elimination of Pneumatic Control Valve

Zhang

2021

Processes

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Backlash is a commonly non-linear phenomenon, which can directly degrade the control accuracy of a pneumatic control valve. To explain the cause and law of backlash error, and to propose an effective method, many research works on the modeling of a pneumatic control valve system have been carried out. The currently model of a control valve system can be classified as a physical model, data-driven model, and semi-physical model. However, most models only consider the force-displacement conversion process of a pneumatic diagram actuator in a pneumatic control valve system. A physical model based on the whole workflow of the pneumatic control valve system is established and a control method to eliminate the backlash error is proposed in this paper. Firstly, the physical model of the pneumatic control valve system is established, which is composed of three parts: pneumatic diaphragm actuator model, nozzle-flapper structure model and electromagnetic model. After that, the input–output relationship of the pneumatic control valve system can be calculated according to the established physical model, and the calculation results are consistent with the experimental result. Lastly, a self-calibration PID (SC-PID) control method is proposed for backlash error elimination. The proposed method can solve valve stem oscillation caused by backlash during valve control.

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Section: Experimental Equipmentmentioning

confidence: 99%

“…Substituting (31) into (16), the function relationship between the input air pressure of the pneumatic diaphragm actuator P b and input current i can be obtained:…”

Section: Model Integrationmentioning

confidence: 99%

A New Control Method for Backlash Error Elimination of Pneumatic Control Valve

Zhang

2021

Processes

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Study and Implementation of Smart Positioner Prototype for Industrial Applications

Rajesh,

Dhinesh Kumar,

Manoj

et al. 2024

Proceedings of the NIELIT's International Conference on Communication, Electronics and Digital Technology

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A New Positioning Strategy Based on Parameter Tuning and Optimal Control Technique for Pneumatic Control Valve

Zhang

Jiang

et al. 2022

Actuators

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To improve the accuracy, rapidity, and versatility of pneumatic control valves, mechanism modeling, and optimization analysis on pneumatic actuators were carried out, and then a new positioning strategy based on parameter tuning and optimal control technique was proposed consequently. Firstly, a dynamic model of valve position based on optimal control under constraint conditions was established, and the characteristic parameters of valve position motion were determined. Then, the adaptive processing of switching points was introduced into the optimal control strategy to improve the versatility of the control. Finally, according to different control strategy partitions, the interactive control of the piezoelectric air switch by fully open control and PWM improves the control accuracy of the algorithm. The experimental analysis of the control effect with other brand positioners shows that the proposed control strategy shortens the system adjustment time, improves the accuracy of valve position, and avoids the overshoot.

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Research on control algorithm of intelligent valve positioner based on parameter self-tuning

Cited by 3 publications

References 11 publications

A New Control Method for Backlash Error Elimination of Pneumatic Control Valve

A New Control Method for Backlash Error Elimination of Pneumatic Control Valve

Study and Implementation of Smart Positioner Prototype for Industrial Applications

A New Positioning Strategy Based on Parameter Tuning and Optimal Control Technique for Pneumatic Control Valve

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