Technical Briefs

Efficiency Mapping for a Linear Hydraulic-Actuator

[+] Author and Article Information
Noah D. Manring

Mechanical and Aerospace Engineering,
University of Missouri,
Columbia, MO 65211
e-mail: ManringN@missouri.edu

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received March 8, 2013; final manuscript received July 10, 2013; published online August 26, 2013. Assoc. Editor: Nariman Sepehri.

J. Dyn. Sys., Meas., Control 135(6), 064505 (Aug 26, 2013) (4 pages) Paper No: DS-13-1108; doi: 10.1115/1.4024997 History: Received March 08, 2013; Revised July 10, 2013

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.

Copyright © 2013 by ASME
Topics: Actuators , Valves , Design
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Grahic Jump Location
Fig. 1

Schematic of a linear hydraulic-actuator

Grahic Jump Location
Fig. 2

Linear approximations for the open-area flow passages of the 4-way valve

Grahic Jump Location
Fig. 3

Efficiency map for the linear hydraulic-actuator



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