CLC number:
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2022-08-30
Cited: 0
Clicked: 1367
Citations: Bibtex RefMan EndNote GB/T7714
He LIU, Bin ZHAO, Bo WANG, Long QUAN, Yun-xiao HAO, Yun-wei LI. Flow control characteristics of the digital and mechanical redundancy control electric modulation valve[J]. Journal of Zhejiang University Science A, 2022, 23(8): 599-609.
@article{title="Flow control characteristics of the digital and mechanical redundancy control electric modulation valve",
author="He LIU, Bin ZHAO, Bo WANG, Long QUAN, Yun-xiao HAO, Yun-wei LI",
journal="Journal of Zhejiang University Science A",
volume="23",
number="8",
pages="599-609",
year="2022",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2100526"
}
%0 Journal Article
%T Flow control characteristics of the digital and mechanical redundancy control electric modulation valve
%A He LIU
%A Bin ZHAO
%A Bo WANG
%A Long QUAN
%A Yun-xiao HAO
%A Yun-wei LI
%J Journal of Zhejiang University SCIENCE A
%V 23
%N 8
%P 599-609
%@ 1673-565X
%D 2022
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2100526
TY - JOUR
T1 - Flow control characteristics of the digital and mechanical redundancy control electric modulation valve
A1 - He LIU
A1 - Bin ZHAO
A1 - Bo WANG
A1 - Long QUAN
A1 - Yun-xiao HAO
A1 - Yun-wei LI
J0 - Journal of Zhejiang University Science A
VL - 23
IS - 8
SP - 599
EP - 609
%@ 1673-565X
Y1 - 2022
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2100526
Abstract: The electrical modulation valve can provide proportional output valve element displacement, flow, or pressure according to a continuously changing input electrical signal. It is the core component of electro-hydraulic proportional control technology. To remove the influence of pressure difference changes on the output flow, the traditional scheme is to use a pressure compensation valve, which increases the difficulty of both manufacturing and maintaining the valve. To solve this problem, a method of digital and mechanical redundancy control flow is proposed. Pressure sensors are installed at the inlet and outlet of the valve, and the controller adjusts the displacement of the valve element according to the pressure difference between the valve ports to realize high-precision control of the flow. A pressure compensation valve is installed in front of the valve, and a three-way solenoid valve is used to control the working of the compensation valve. In the case of sensor failure, the valve is switched to the mechanical compensation differential pressure mode, to control the flow and to achieve redundancy control. The system security is thereby improved. The feasibility of this scheme is verified through simulation and tests. The results show that, both for digital compensation and mechanical compensation, the output flow can be kept constant when the pressure difference changes, and the system has good static and dynamic characteristics. The principle can be applied to the displacement-flow feedback type electrical modulation valve, and can realize accurate control of the flow of the pilot valve and, finally, accurate control of the flow in the main valve.
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