This research is aimed at generating an efficiency map for a linear hydraulic-actuator that is controlled using an open-centered 4-way valve. Using the basic configuration of a double rod, double-acting linear actuator, equations for describing the input and output power of the actuator are written and nondimensionalized to produce a nondimensional map for the efficiency of the actuator itself. In conclusion, the actuator is shown to operate below a wide open valve (WOV) line with efficiencies that are typically less than 50%. Note that the WOV line describes the maximum actuator-force that may be achieved at a given actuator-velocity. While the actuator chosen for this paper is common, extensions of the methods used in this study may be applied to double-acting, single-rod designs or single-acting, single-rod designs. Furthermore, it is anticipated that this type of analysis may also be used to study the effects of power regenerating valves and for predicting the efficiency improvements that may be gained for linear hydraulic-actuators that use this type of valve design.

References

References
1.
Blackburn
,
J. F.
,
Reethof
,
G.
, and
Shearer
,
J. L.
,
1960
,
Fluid Power Control
,
The Technology Press of MIT/Wiley
,
New York
.
2.
Merrit
,
H. E.
,
1967
,
Hydraulic Control Systems
,
Wiley
,
New York
.
3.
Manring
,
N. D.
,
2005
,
Hydraulic Control Systems
,
Wiley
,
New York
.
4.
Watton
,
J.
,
2009
,
Fundamentals of Fluid Power Control
,
Cambridge University
,
Cambridge, England
.
5.
Shen
,
X.
, and
Peng
,
H.
,
2003
, “
Analysis of Active Suspension Systems With Hydraulic Actuators
,”
Proceedings of the International Association for Vehicle System Dynamics (IAVSD) Conference
,
Atsugi, Japan
, pp.
1
10
.
6.
Yoo
,
J.-H.
, and
Wereley
,
N. M.
,
2002
, “
Design of a High-Efficiency Magnetorheological Valve
,”
J Intell. Mater. Syst. Struct.
,
13
, pp.
679
685
.10.1177/1045389X02013010012
7.
Yao
,
B.
,
Bu
,
F.
, and
Chiu
,
G. T. C.
,
2001
, “
Non-Linear Adaptive Robust Control of Electro-Hydraulic Systems Driven by Double-Rod Actuators
,”
Int. J. Control
,
74
(
8
), pp.
761
775
.10.1080/002071700110037515
8.
Allyne
,
A.
,
1998
, “
A Systematic Approach to the Control of Electrohydraulic Servosystems
,”
Proceedings of the American Control Conference
,
Philadelphia, PA
, pp.
833
837
.
9.
Allyne
,
A.
,
1996
, “
Nonlinear Force Control of an Electrohydrualic Actuator
,”
Proceedings of the Japan/USA Symposium on Flexible Automation
,
Boston, MA
, pp.
193
200
.
10.
Zupan
,
M.
,
Ashby
,
M. F.
, and
Fleck
,
N. A.
,
2002
, “
Actuator Classification and Selection—The Development of a Database
,”
Adv. Eng. Mater.
,
4
(
12
), pp.
933
939
.10.1002/adem.200290009
You do not currently have access to this content.