Research Status and Prospects of Control Strategies for High Speed On/Off Valves

Gao, Qingqing; Wang, Jie; Zhu, Yong; Wang, Jun; Wang, Jinchuan

doi:10.3390/pr11010160

Cited by 13 publications

(6 citation statements)

References 73 publications

(83 reference statements)

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“…The experiments reveal that this method can also control errors within a very small range under high voltage, proving the effectiveness of the simulation model. Gao et al [8] discussed the development of control strategies for high speed on/off valves (HSVs), and reviewed the research results on discrete voltage and pulse control in single HSVs and coding control in parallel HSVs. The advantages and disadvantages of different control strategies and their application ranges were analyzed and compared, and their development trend is predicted from multiple aspects.…”

Section: Intelligent Control and Maintenance In Hydraulic Systemsmentioning

confidence: 99%

Special Issue: Intelligent Control and Maintenance of Fluid Component and System

et al. 2023

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Section: Intelligent Control and Maintenance In Hydraulic Systemsmentioning

confidence: 99%

Special Issue: Intelligent Control and Maintenance of Fluid Component and System

et al. 2023

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“…Among the various digital and discrete techniques used to control digital hydraulic valves, pulse width modulation (PWM) stands out as one of the most significant [29,30]. When PWM techniques are employed, digital hydraulic valves are commonly known as high frequency switching digital hydraulic valves (HFSVs) [31].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Numerical Analysis of a Four-Way Two-Position (4/2) High-Frequency Switching Digital Hydraulic Valve Driven by a Ring Stack Actuator

Tamburrano,

Sciatti,

Distaso

et al. 2023

Energies

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This paper presents a feasibility study using a commercially available ring stack actuator to develop a four way-two position (4/2) high frequency switching digital hydraulic valve. The excellent characteristics of multilayer piezoelectric actuators, such as a simple design, reduced moving parts, high reliability, and fast response, make them ideal for constructing this type of digital hydraulic valve. High frequency switching digital hydraulic valves (HFSVs), indeed, must be able to switch from fully open to fully closed positions in less than 5 ms, while maintaining minimal pressure losses and delivering large flows. The proposed valve architecture is assessed using well-established equations implemented in a Simulink model, allowing the hydraulic, mechanical, and electrical parts of the valve to be accurately simulated. The paper first provides a detailed description of the numerical model. Next, the hysteresis model of the ring stack actuator is validated against the data provided by the manufacturers on their website. Finally, the numerical results obtained with both open-loop and closed-loop control systems are presented. The simulations show that at a switching frequency of 200 Hz with maximum amplitude and duty cycle of the input pulse digital signal, the valve exhibits high average flow rates (~60 L/min), low average power consumption (~1500 W), and maintains a pressure drop of only 15 bar. Moreover, the simulations reveal that the control system is very effective since the valve switching time is within 1 ms.

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“…An HSV operates when it is either fully open or fully closed. It has advantages, such as a low pressure loss, a low energy consumption, a strong anti-pollution ability, an easy-to-use PWM control, and the direct conversion of digital signals into flow signals [7][8][9], which has been widely used in valve-controlled hydraulic control systems. The main performance indicators of HSVs include dynamic characteristics, static flow characteristics, and heat transfer [10].…”

Section: Introductionmentioning

confidence: 99%

Pulse-Width-Modulation-Based Time-Delay Compensation Control for High-Speed On/Off Valves

Li,

Hao,

Wang

et al. 2023

Electronics

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The dynamic characteristics of high-speed on/off valves (HSVs) are a key factor in measuring their performance, and determining the control accuracy of valve-controlled systems. Furthermore, the hysteresis characteristics of HSVs can seriously affect their dynamic characteristics. This study evaluated the hysteresis characteristics of HSVs in a valve-controlled hydraulic control system, and considered the pressure changes in front of the valve during the opening and closing process of the valve core. A time-delay compensation control (TDCC) based on pulse-width modulation (PWM) was proposed. The reference PWM signal was used to control the opening and closing time of the HSV, while the loading signal was composed of an opening compensation PWM, an excitation PWM, an opening holding PWM, and a closing compensation PWM. Using an opening compensation PWM to start the initial current, combined with current feedback and pressure changes in front of the valve, the amplitude and duty cycle of different PWM signals were determined in real time. This reduced the time delay and working current of the HSV during opening and closing. A simulation comparison analysis was conducted, with a single PWM control and a pre-excitation control algorithm (PECA). The results showed that, compared to a single PWM control, the TDCC can reduce the overall opening and closing time delay by 78.1%, and the energy consumption by 64.7%. Compared with PECA, the overall opening and closing time delay was reduced by 10.9%, and the energy consumption was reduced by 28%. At the same time, the frequency response of the valve core displacement increased by 70%, compared to the single PWM control.

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Research Status and Prospects of Control Strategies for High Speed On/Off Valves

Cited by 13 publications

References 73 publications

Special Issue: Intelligent Control and Maintenance of Fluid Component and System

Special Issue: Intelligent Control and Maintenance of Fluid Component and System

Comprehensive Numerical Analysis of a Four-Way Two-Position (4/2) High-Frequency Switching Digital Hydraulic Valve Driven by a Ring Stack Actuator

Pulse-Width-Modulation-Based Time-Delay Compensation Control for High-Speed On/Off Valves

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