An efficient, compact and low-cost Dual Cylinder Hydrostatic Actuator (DCHA). Issue 2 (4th May 2018)

• Record Type: Journal Article
• Authors: Wiens, Travis
• Is Part Of: International journal of fluid power. Volume 19:Issue 2(2018)
• Page Start: 80
• Page End: 90
• Publication Date: 2018-05-04
• Subjects: Efficiency -- pump control -- hydrostatic -- energy recovery; Fluid power technology -- Periodicals; Fluid mechanics -- Periodicals; Fluid mechanics; Fluid power technology; Periodicals; 621.205
• DOI: 10.1080/14399776.2018.1437321
• Languages: English
• ISSNs: 1439-9776

Abstract

Abstract: Pump-controlled systems are highly efficient alternatives to the high throttling losses of valve-controlled systems. Closed-circuit systems have been widely adopted for rotary loads, but the asymmetrical nature of linear actuators has limited their acceptance. Hydrostatic linear actuators typically are costly or complex, inefficient or exhibit low force density. This paper presents a Dual Cylinder Hydrostatic Actuator, which is highly efficient for both resistive and overrunning loads, uses commercially available low-cost components, and provides the same high force of a conventional system in a similarly sized system. A steady-state model is presented, along with an experimental validation on a small-scale apparatus. An analysis of a full-scale application is performed, including strategies for mitigation of energy losses.