Flow control valves are extensively used to control the motion of hydraulic actuators in industry. In this paper, a two-stage proportional flow control valve with pilot digital pressure compensator is presented. The proposed valve is composed of two pressure sensors, a proportional pilot valve, a Valvistor poppet valve (main stage), and an electronic controller. The pressure drop across the pilot valve metering orifice is detected by two pressure sensors and fed into the controller which changes the pilot valve input voltage to compensate pressure influence on the outlet flow. The presented valve is investigated theoretically by simplified analytical models as well as numerical methods and also evaluated experimentally. The results show that the proposed scheme is feasible. It has a reasonable static performance and an acceptable dynamic characteristic for low bandwidth disturbances. The flow force on the Valvistor poppet should be estimated and considered in the controller design.

References

References
1.
Huayong
,
Y.
,
Hu
,
S.
,
Guofang
,
G.
, and
Guoliang
,
H.
,
2009
, “
Electro-Hydraulic Proportional Control of Thrust System for Shield Tunneling Machine
,”
Autom. Constr.
,
18
(
7
), pp.
950
956
.
2.
Kenji
,
S.
, and
Eizo
,
U.
,
2008
, “
Development of a Water Hydraulic Pressure-Compensated Flow Control Valve
,”
Int. J. Fluid Power
,
9
(
3
), pp.
25
33
.
3.
Eriksson
,
B.
,
Larsson
,
J.
, and
Palmberg
,
J.-O.
,
2007
, “
A Novel Valve Concept Including the Valvistor Poppet Valve
,”
10th Scandinavian International Conference on Fluid Power
,
J.
Vilenius
, and
K. T.
Koskinen
, eds., May 21–23, Tampere, Finland, pp.
355
364
.
4.
Wu
,
D.
,
Burton
,
R.
,
Schoenau
,
G.
, and
Bitner
,
D.
,
2007
, “
Analysis of a Pressure-Compensated Flow Control Valve
,”
ASME J. Dyn. Syst., Meas., Control
,
129
(
3
), pp.
203
211
.
5.
Cheng
,
M.
,
2005
, “
Modeling and Analysis of a Pressure Compensated Flow Control Valve
,”
ASME
Paper No. FEDSM2005-77057.
6.
Kuehnlein
,
M.
,
Liermann
,
M.
,
Ewald
,
J.
, and
Murrenhoff
,
H.
,
2012
, “
Adjustable Flow-Control Valve for the Self-Energising Electro-Hydraulic Brake
,”
Int. J. Fluid Power
,
13
(
2
), pp.
5
14
.
7.
Wu
,
G.
,
Huang
,
Y.
, and
Qiu
,
M.
,
1983
, “
Electro-Hydraulic Proportional Flow Control Valve Based on the New Principle of Flow-Displacement-Force Feedback
,”
Chin. Hydraul. Pneum.
,
1
, pp.
1
7
.
8.
Qingfeng
,
W.
,
Bo
,
H.
,
Linyi
,
G.
, and
Yongxiang
,
L.
,
1997
, “
Digital Pressure Compensation Method for Anti-Disturbance in Electrohydraulic Proportional Velocity Control System
,”
J. Mech. Eng.
,
33
(
6
), pp.
81
86
.
9.
Andersson
,
B. R.
,
1984
, “
On the Valvistor; A Proportionally Controlled Seat Valve
,” Linkoping Studies in Science and Technology, Dissertations, p.
108
.
10.
Wu
,
P. D.
, and
Kitagawa
,
A.
,
1987
, “
A Study on the Poppet Valve With Series Restriction Chokes (1st Report, The Mathematical Analysis and Experiments of Static Characteristics)
,”
Trans. Jpn. Soc. Mech. Eng. Ser. B
,
53
(
490
), pp.
1750
1755
.
11.
Wu
,
P. D.
,
Kitagawa
,
A.
, and
Takenaka
,
T.
,
1987
, “
A Study on the Poppet Valve With Series Restriction Chokes (2nd Report, The Mathematical Analysis and Experiments of Dynamic Characteristics on a Direction/Flow Control)
,”
Trans. Jpn. Soc. Mech. Eng. Ser. B
,
53
(
493
), pp.
2824
2828
.
12.
Wu
,
P. D.
,
Kitagawa
,
A.
, and
Takenaka
,
T.
,
1988
, “
A Study on the Poppet Valve With Series Restriction Chokes (3rd Report, Proposition of New Type Logic Valve and Static Characteristics of Newly Proposed Relief Logic Valve
,”
Trans. Jpn. Soc. Mech. Eng. Ser. B
,
54
(
498
), pp.
404
409
.
13.
Luomaranta
,
M. K.
,
Vilenius
,
M. J.
, and
Makela
,
K. T.
,
1989
, “
Valvistor Based Modern Servo Package
,”
JHPS International Symposium on Fluid Power
, Tokyo, Japan, pp.
557
564
.
14.
Zhang
,
R.
,
Andrew
,
G. A.
, and
Prasetiawan
,
E. A.
,
2002
, “
Performance Limitations of a Class of Two-Stage Electro-Hydraulic Flow Valves
,”
Int. J. Fluid Power
,
3
(
1
), pp.
47
53
.
15.
Eriksson
,
B.
,
Andersson
,
B. R.
, and
Palmberg
,
J. O.
,
2007
, “
The Dynamic Properties of a Poppet Type Hydraulic Flow Amplifier
,”
10th Scandinavian International Conference on Fluid power
,
J.
Vilenius
, and
K. T.
Koskinen
, May 21–23, Tampere, Finland, pp.
161
178
.
16.
Park
,
S.-H.
,
2009
, “
Development of a Proportional Poppet Type Water Hydraulic Valve
,”
Proc. IMechE, Part C: J. Mech. Eng. Sci.
,
223
(
9
), pp.
2009
2107
.
17.
Quan
,
L.
,
Xu
,
X.
,
Yan
,
Z.
, and
Zhang
,
X.
,
2010
, “
A New Kind of Pilot Controlled Proportional Direction Valve With Internal Flow Feedback
,”
Chin. J. Mech. Eng.
,
23
(
1
), pp.
60
65
.
You do not currently have access to this content.