In this paper, we present a novel design for single-rod hydrostatic actuators that produces a stable response in all operation quadrants. The new design, which can have different embodiments, is built upon compensating for the differential flows coming in and out of single-rod actuators, by alternately connecting cap and rod sides of the cylinder to a flow source in accordance with the energy flow direction between the circuit and the load. We show that previous quadrant division definitions result in either geometric quadrants that do not coincide with motoring and pumping operation, or misrepresentations of the actual energy exchange between the load and the cylinder. The proposed quadrant representation gives the exact information about the right operation of compensating flow valves. The efficacy of the new design has been tested on an instrumented John Deere JD-48 backhoe. Precise redirection of the compensation flow allowed for nonoscillatory motions in all quadrants of operation and various loading conditions.

References

References
1.
Frankenfield, T. C., 1984, “Using Industrial Hydraulics,” Hydraulics and Pneumatics Magazine, Cleveland, OH.
2.
Hewett
,
A. J.
,
1994
, “
Hydraulic Circuit Flow Control
,” University of British Columbia, Vancouver, BC, Canada, U.S. Patent No. https://patents.google.com/patent/US5329767A/en
3.
Rahmfeld
,
R.
, and
Ivantysynova
,
M.
,
1998
, “
Energy Saving Hydraulic Actuators for Mobile Machines
,”
First Bratislavian Fluid Power Symposium
, Casta Pila, Slovakia, June 2–3, pp.
47
57
.
4.
Wang
,
L.
,
Book
,
W. J.
, and
Huggins
,
J. D.
,
2012
, “
A Hydraulic Circuit for Single Rod Cylinder
,”
ASME J. Dyn. Syst. Meas. Control
,
134
(
1
), p.
011019
.
5.
Altare
,
G.
, and
Vacca
,
A.
,
2015
, “
A Design Solution for Efficient and Compact Electro-Hydraulic Actuators
,”
Procedia Eng.
,
106
, pp.
8
16
.
6.
Calıskan
,
H.
,
Balkan
,
T.
, and
Platin
,
B. E.
,
2015
, “
A Complete Analysis and a Novel Solution for Instability in Pump Controlled Asymmetric Actuators
,”
ASME J. Dyn. Syst. Meas. Control
,
137
(
1
), p.
091008
.
7.
Heybroek
,
K.
,
Vael
,
G.
, and
Palmberg
,
J.-O.
,
2012
, “
Towards Resistance-Free Hydraulics in Construction Machinery
,”
Eighth International Fluid Power Conference
, Vol. 2, IFK, Dresden, Germany, Mar. 26–28, pp. 123–138.
8.
Costa
,
G. K.
, and
Sepehri
,
N.
,
2015
,
Hydrostatic Transmissions and Actuators—Operation, Modelling and Applications
,
Wiley
,
Chichester, UK
.
9.
Karvonen
,
M.
,
2016
, “
Energy Efficient Digital Hydraulic Power Management of a Multi Actuator System
,”
Ph.D. thesis
, Tampere University of Technology, Tampere, Finland.https://tutcris.tut.fi/portal/files/5793153/Karvonen_1384.pdf
10.
Heybroek
,
K.
,
2008
, “
Saving Energy in Construction Machinery Using Displacement Control Hydraulics. Concept Realization and Validation
,”
Ph.D. thesis
, Linko¨ping University, Linköping, Sweden. https://www.diva-portal.org/smash/get/diva2:126676/FULLTEXT01.pdf
11.
Williamson
,
C.
,
2010
, “
Power Management for Multi-Actuator Mobile Machines With Displacement Controlled Hydraulic Actuators
,”
Ph.D. thesis
, Purdue University, West Lafayette, IN. https://docs.lib.purdue.edu/dissertations/AAI3449412/
12.
Williamson
,
C.
, and
Ivantysynova
,
M.
,
2008
, “
Pump Mode Prediction for Four-Quadrant Velocity Control of Valveless Hydraulic Actuators
,”
Seventh JFPS International Symposium on Fluid Power
, Toyama, Japan, Sept. 15–18, pp.
323
328
.https://pdfs.semanticscholar.org/b055/95fd653dcaff415e99780cf232c727759391.pdf
13.
Costa
,
G.
,
K.
, and
Sepehri
,
N.
,
2017
, “
Logic-Controlled Flow Compensation Circuit for Operating Single-Rod Hydrostatic Actuators
,” U.S. Provisional Patent No. 62/574,326.
14.
Imam
,
A.
,
Rafiq
,
M.
,
Jalayeri
,
E.
, and
Sepehri
,
N.
,
2017
, “
Design, Implementation and Evaluation of a Pump-Controlled Circuit for Single Rod Actuators
,”
Actuators
,
6
(
10
), pp.
1
15
.
15.
Stelson
,
K. A.
,
2011
, “
Saving the World's Energy With Fluid Power
,”
Eighth JFPS International Symposium on Fluid Power
, Okinawa, Japan, pp. 1–7.
16.
Ivantysynova
,
M.
,
2008
, “
Innovations in Pump Design—What are Future Directions?
,” Proceedings of the 7th JFPS International Symposium on Fluid Power, Toyama, Japan, pp. 60–64.
17.
Casey
,
B.
,
2016
, “
How to Calculate Hydraulic Cylinder Efficiency
,” Hydraulic Supermarket, West Perth, Australia, accessed Sept. 13, 2018, http://www.hydraulicsupermarket.com/blog/all/how-to-calculate-hydraulic-cylinder-efficiency/
18.
Merritt
,
H. E.
,
1967
,
Hydraulic Control Systems
,
John Wiley & Sons
,
New York
.
You do not currently have access to this content.