Modeling and Dynamic Characteristics of a Novel High-Pressure and Large-Flow Water Hydraulic Proportional Valve

Zhang, Heng; Liao, Yaoyao; Tao, Ze; Zi-sheng, Lian; Zhao, Ruihao

doi:10.3390/machines10010037

Cited by 15 publications

(11 citation statements)

References 24 publications

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Section: Introductionmentioning

confidence: 95%

“…The steady-state flow force increases and then decreases with the increase of valve opening. The research by Zhang et al 9 also verified the nonlinearity of the steady-state flow force of the slide valve and pointed out that this nonlinearity caused the valve opening time to be longer than the closing time. The key to accurate control of servo-proportional valve spool displacement is to solve the nonlinearity problem of the spool displacement control system.…”

Section: Introductionmentioning

confidence: 95%

“…However, servo proportional valves have nonlinearities such as hysteresis, magnetic saturation, friction and flow force due to construction and machining accuracy limitations. [4][5][6][7][8][9] In addition, some parameters are time-varying and uncertain. 10,11 The solenoid of an electromagnet is often seen as a combination of resistance and inductance.…”

Section: Introductionmentioning

confidence: 99%

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State feedback spool position control with integral compensation for servo proportional valve

Chen

Jin

Zhang³

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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In recent years, servo proportional valves have been widely used in the industry owing to the advantages of high stability and low cost. However, the nonlinearity and parameter uncertainty present in the servo proportional valves make it difficult to control the spool position. This paper proposes a state feedback control with integral compensation for the spool displacement control of the servo proportional valve, which aims to solve the problem that state feedback is difficult to overcome system nonlinearity and parameter uncertainty. The key to this control method is the addition of an outer loop negative feedback and an integral element. At the same time, the control method can realize pole configuration, convenient control parameter adjustment, low hardware requirements, and easy engineering application. Experimental and simulation results show that the integral element can compensate for the system’s nonlinearities and uncertain parameters, and eliminate the steady-state error of displacement tracking. The state feedback with integral compensation can improve the frequency response of the servo proportional valve compared to traditional PID control.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

State feedback spool position control with integral compensation for servo proportional valve

Chen

Jin

Zhang³

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Coal is the primary energy source in China. Longwall mining technology is the most efficient and widely used technology in coal mining today [1][2][3][4]. The longwall fully mechanized mining face comprises hydraulic support, a scraper conveyor, a shearer, and other auxiliary equipment [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Chain Drive in a Scraper Conveyor under Various Working Conditions

et al. 2022

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A scraper conveyor is important in coal mining. During operation, its working performance is affected by chain speed fluctuations, terrain fluctuations, and load changes. Thus, evaluating the influence of these factors on the dynamic properties of a scraper conveyor is important. This study first built a dynamic property test bench. Then, the vibration signals of the reducer output shaft were measured under various chain speed, terrain, and load conditions. Finally, the dynamic properties of a scraper conveyor were evaluated by conducting a frequency domain analysis of the measured vibration signals. The results show that the output shaft of the motor, the second shaft, and the second-stage meshing gear of the reducer are sensitive to external factors. Under the terrain conditions of “horizontal + vertical” bending, the middle chute was the most sensitive to the meshing frequency of the sprocket chain. This type of condition had a significant influence on the scraping phenomenon of the scraper and the middle chute. Under various load conditions, the amplitude of each shaft of the reducer decreased, especially the amplitude of the motor output shaft, but the scraping amplitude of the scraper and middle chute greatly increased. This study is of great significance for improving the dynamic properties and structural optimization of scraper conveyors.

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“…Chattopadhyay et al [18] investigated the flow through the spool valve at different valve openings and pressure drops with a 3D CFD modeling technique. Zhang Heng et al [19] established a simulation model of the new proportional valve, and the test results under different working conditions verified the reliability and feasibility of the design, and they studied the motion relationship between the pilot stage and the main stage and analyzed the influence of structural parameters on stability. In general, these studies focused on the overall performance of hydraulic valves.…”

Section: Introductionmentioning

confidence: 99%

Characteristics Analysis of the Pilot-Operated Proportional Directional Valve by Experimental and Numerical Investigation

Juan

Shi

et al. 2022

Energies

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The main valve spool structure of the pilot-operated proportional directional valve is diverse and has a direct impact on the flow field. To improve the valve’s performance, this work studied the characteristics of four types of spool structures with the following throttling groove arrangements: no throttling groove, a U-shaped groove, a triangle groove, and a combined groove. This study analyzed the flow field simulation of four spool structures under the same opening degree and different pressures to study the flow field cavitation characteristics and pressure distribution in the valve. According to the simulation results, the necessity of opening throttling grooves for the pilot proportional directional valve and the advantages of combined grooves over U-shaped and triangular grooves were verified. Then, the proportional valve with a combined groove structure was simulated and analyzed to study its throttling characteristics, steady flow characteristics, and flow and load differential pressure characteristics, and further explore the advantages of a combined groove. Finally, the experimental results are compared with the simulation results, which can provide a theoretical reference for the selection of the throttle groove of the proportional valve and the structural design of the slide valve.

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Modeling and Dynamic Characteristics of a Novel High-Pressure and Large-Flow Water Hydraulic Proportional Valve

Cited by 15 publications

References 24 publications

State feedback spool position control with integral compensation for servo proportional valve

State feedback spool position control with integral compensation for servo proportional valve

Dynamic Properties of Chain Drive in a Scraper Conveyor under Various Working Conditions

Characteristics Analysis of the Pilot-Operated Proportional Directional Valve by Experimental and Numerical Investigation

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