Numerical and experimental nonlinear dynamics of a proportional pressure-regulating valve

Wu, Wei; Wei, Chunhui; Zhou, Junjie; Hu, Jibin; Yuan, Shuai

doi:10.1007/s11071-020-06125-0

Cited by 13 publications

(4 citation statements)

References 28 publications

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“…The DREHSV is a closed-loop control system that relies on the displacement sensor at the right of the spool. Its response to a sine or step signal [23] can be utilized to evaluate its dynamic characteristics. To obtain the dynamic characteristic curves, the spool displacement was taken as the observed quantity, and the input signal was taken as the control quantity, as shown in Figure 12.…”

Section: Drehsv Normal Modementioning

confidence: 99%

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Liang,

Wang,

Zhai

et al. 2023

Actuators

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The feedback spring rod of the armature assembly was eliminated in the double-redundancy electro-hydraulic servo valve (DREHSV), which employed a redundant design in contrast to the typical double-nozzle flapper electro-hydraulic servo valve (DNFEHSV). The pilot stage was mainly composed of four torque motors, and the double-system spool was adopted in the power stage. Consequently, the difficulty of spool displacement control was increased. By artificially changing the structural parameters of the simulation model in accordance with the theoretical analysis through AMESim, this paper aimed to study the dynamics and static characteristics of the DREHSV. The advantage of redundant design was further demonstrated by disconnecting working coils and setting the different worn parts of the spool. On the test bench, the necessary experiments were performed. Through simulation, it was discovered that when the clogged degree of the nozzle is increased, the zero bias value increases, the pressure and flow gain remain unchanged, and the internal leakage decreases. The pressure gain changes very little, the flow gain close to the zero position grows, the zero leakage increases significantly, and the pilot stage leakage changes very little as a result of the wear of the spool throttling edge. The basic consistency between the simulation curves and the experimental findings serve to validate the accuracy of the AMESim model. The findings can serve as a theoretical guide for the design, debugging, and maintenance of the DREHSV. The simulation model is also capable of producing a large amount of sample data for DREHSV fault diagnosis using a neural network.

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Section: Drehsv Normal Modementioning

confidence: 99%

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Liang,

Wang,

Zhai

et al. 2023

Actuators

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show abstract

“…In direct-operated control valves, Dülk I et al [13,14] used one proportional solenoid to drive the spool of a proportional flow valve and controlled the flow by varying the current of the proportional solenoid. Wu W et al [15,16] used one proportional solenoid to drive a direct-operated proportional pressure regulating valve and controlled the pressure by varying the current of the proportional solenoid. Chen CP and Chiang MH [17] also used one proportional solenoid to drive a direct-operated proportional pressure regulating valve, but unlike Wu W et al they controlled the pressure by varying the voltage of the proportional solenoid.…”

Section: Single Solenoid Drivementioning

confidence: 99%

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Li,

Yang

et al. 2023

Processes

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Hydraulic control valves are widely used in industrial production, agricultural equipment, construction machinery, and other large power equipment for controlling the pressure and flow of fluids in hydraulic systems. The driving method has a significant impact on the response and control accuracy of hydraulic valves. This paper reviews the driving methods of spools from five aspects: solenoid drive, material expansion drive, motor drive, hydraulic valve drive, and another drive. It summarizes the various schemes currently available for spool drive and analyzes each of them. After optimizing the driving method of the valve core, the control accuracy can reach 3%, and the minimum response time is 7 ms. According to the characteristics of the different drive methods, the differences between them are compared, the advantages and disadvantages of each drive method are analyzed, and the application scenarios for each drive method are identified. Solutions to the drawbacks of the existing drive methods are proposed, which provide directions for further optimization. We have found that solenoid drives are simple to control, low cost, and the most widely used. Material telescopic drives, motor drives, hydraulic valve drives, and other drives are costly, complex to control, and optional for use in special requirement situations. Based on the existing spool drive methods, an outlook on future drive methods is presented. This review facilitates a comprehensive understanding of the drive methods of hydraulic valve spools, points out the shortcomings of the existing drive methods, and is of great significance in improving the existing drive methods and proposing new drive methods. This paper has a positive effect on improving the control accuracy and responsiveness of hydraulic valves.

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“…Before designing a proper controller, the first step is to establish an accurate plant model. The physical model of a PPRV includes static and dynamic models of the proportional electromagnet (Liu et al, 2011), flow force acting on the spool (Gui et al, 2022), spring stiffness (Wu et al, 2021), nonlinear friction force (Cai et al, 2022), hydraulic fluid compressibility, and leakage flow across the chambers. Modeling these details need large amounts of professional experiments and various errors will accumulate, resulting in a large gap between the final model and the real plant.…”

Section: Introductionmentioning

confidence: 99%

Second-order adaptive robust control of proportional pressure-reducing valves using phenomenological model

Zhang,

Fang,

et al. 2024

Transactions of the Institute of Measurement and Control

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Proportional pressure-reducing valve (PPRV) is widely used in brake circuits and pilot supply lines for directional control valves. The performance of PPRV can be degraded because of the effect of magnetic hysteresis, frictions, and other disturbances, which worsens the accuracy of the entire hydraulic system. This paper presents a high-performance pressure controller of a PPRV considering the model nonlinearities. A nonlinear phenomenological model based on the Hammerstein modeling method is first developed to describe the dynamics of a PPRV. A pressure-dependent damping ratio is carried out to handle the asymmetric nonlinearity at the starting process of pressure adjustments, and a series of experiments are conducted to verify the effectiveness of the model. A second-order adaptive robust controller is developed based on the Lyapunov theorem to guarantee the tracking performance in the presence of parameter uncertainties and uncertain nonlinearities. Comparative experiments show that the proposed second-order adaptive robust control algorithm together with the phenomenological model achieves a significant reduction in pressure-tracking error, compared with the one without the proposed plant model, or other existing controllers such as the feedforward proportional–integral–derivative (PID) controller and the first-order adaptive robust controller.

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Numerical and experimental nonlinear dynamics of a proportional pressure-regulating valve

Cited by 13 publications

References 28 publications

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Modeling and Fault Simulation of a New Double-Redundancy Electro-Hydraulic Servo Valve Based on AMESim

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Second-order adaptive robust control of proportional pressure-reducing valves using phenomenological model

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