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CLC number: TP271.3

On-line Access: 2014-10-09

Received: 2014-02-23

Revision Accepted: 2014-06-04

Crosschecked: 2014-09-17

Cited: 2

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE C 2014 Vol.15 No.10 P.892-902


A differential control method for the proportional directional valve

Author(s):  Bo Jin, Ya-guang Zhu, Wei Li, De-sheng Zhang, Lu-lu Zhang, Fei-fei Chen

Affiliation(s):  The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   bjin@zju.edu.cn

Key Words:  Differential control method, Frequency response, Proportional directional valve, Spool displacement feedback

Bo Jin, Ya-guang Zhu, Wei Li, De-sheng Zhang, Lu-lu Zhang, Fei-fei Chen. A differential control method for the proportional directional valve[J]. Journal of Zhejiang University Science C, 2014, 15(10): 892-902.

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%A Wei Li
%A De-sheng Zhang
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%DOI 10.1631/jzus.C1400056

T1 - A differential control method for the proportional directional valve
A1 - Bo Jin
A1 - Ya-guang Zhu
A1 - Wei Li
A1 - De-sheng Zhang
A1 - Lu-lu Zhang
A1 - Fei-fei Chen
J0 - Journal of Zhejiang University Science C
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%@ 1869-1951
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C1400056

For the proportional directional valve controlled by two proportional solenoids, the normal control method (NCM) energizes only one solenoid at a time. The performance of the valve is greatly influenced by the nonlinearity of the proportional solenoid, such as dead zone and low force gain with a small current, and this effect cannot be eliminated by a simple dead-zone current compensation. To avoid this disadvantage, we propose the differential control method (DCM). By employing DCM, the controller outputs differential signals to simultaneously energize both solenoids of the proportional valve, and the operating point is found by analyzing the force output of the two solenoids to make a minimum variation of the current force gain. The comparisons of the valve response characteristics are made between NCM and DCM by nonlinear dynamic simulation and experiments. Simulation and experimental results show that by using DCM, the frequency response of the valve is greatly enhanced, especially when the input is small, which means that the dynamic characteristics of the proportional valve are improved.


研究目的:对于由两个比例电磁铁控制的比例方向阀,常用的控制方法仅给其中一个电磁铁供电,因此,阀的性能受到比例电磁铁特性影响,如死区、小电流时的力增益非线性等,且此影响无法用简单的死区电流补偿消除。本文提出差动控制方法(differential control method),以改善比例电磁铁的性能。

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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