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Actuators
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Hydraulic Actuators
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Hydraulic Actuators

A special issue of Actuators (ISSN 2076-0825).

Deadline for manuscript submissions: closed (31 August 2016) | Viewed by 10022

Special Issue Editor

Prof. Dr. Monika Ivantysynova

E-Mail Website
Guest Editor
Maha Professor Fluid Power Systems, Director Maha Fluid Power Reseaech Center, School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
Interests: displacement controlled actuation; hydraulic hybrid systems; energy efficient throttles actuation; modeling of pumps and motors; fluid structure interaction; secondary control; active vibration damping utilizing pump control; powertrain control; noise reduction and active noise control

Special Issue Information

Dear Colleagues,

Hydraulic actuators have been used for primary and secondary flight controls of large commercial and military aircrafts since the late 1950s. Excellent precision control, high bandwidth, together with extreme high power density of those valve controlled hydraulic actuators, have made them the technology of choice for many other industrial applications, and automotive and large vehicle systems. They have also been used to create the first large and powerful robots. However the traditional use of servo- or proportional valves makes the technology inefficient. Since late 1990s, many researchers worldwide work on alternative throttles hydraulic actuation technologies. These new hydraulic actuators can be grouped in the following principles: electro-hydrostatic actuators (EHA), pump controlled actuation, secondary controlled actuators, hydraulic hybrid actuation systems, hydraulic transformers, and hydraulic actuators based digital hydraulics.

This Special Issue will collect review and/or special topic papers on throttles hydraulic actuation.

Prof. Dr. Monika Ivantysynova
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Actuators is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Throttles actuation
  • Electro-hydrostatic actuation
  • Pump controlled actuation
  • Secondary controlled actuation
  • Hydraulic hybrid actuators
  • Hydraulic transformers
  • Hydraulic actuators based on digital hydraulics

Published Papers (1 paper)

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Research

5145 KiB  
Article
Design, Implementation and Evaluation of a Pump-Controlled Circuit for Single Rod Actuators
by Ahmed Imam, Moosa Rafiq, Ehsan Jalayeri and Nariman Sepehri
Actuators 2017, 6(1), 10; https://doi.org/10.3390/act6010010 - 20 Feb 2017
Cited by 28 | Viewed by 9352
Abstract
Pump-controlled hydraulic circuits are more efficient than valve-controlled circuits, as they eliminate the energy losses due to flow throttling in valves and require less cooling effort. Presently existing pump-controlled solutions for single rod cylinders encounter an undesirable performance during certain operating conditions. This [...] Read more.
Pump-controlled hydraulic circuits are more efficient than valve-controlled circuits, as they eliminate the energy losses due to flow throttling in valves and require less cooling effort. Presently existing pump-controlled solutions for single rod cylinders encounter an undesirable performance during certain operating conditions. This paper investigates the performance issues in common pump-controlled circuits for the single rod actuators. Detailed analysis is conducted that identifies these regions in a load-velocity plane and the factors affecting them. The findings are validated by experimental results. A new design is then proposed that employs a limited throttling valve alongside two pilot operated check valves for differential flow compensation to improve the performance. The valve is of the flow control type and is chosen to have a throttling effect over critical regions; it has the least throttling over other operating regions, thus maintaining efficiency. Experimental work demonstrates improved performance in a full operating range of the actuator as compared to a circuit that uses only the pilot-operated check valves. This circuit is energy efficient and capable of recuperating energy. Full article
(This article belongs to the Special Issue Hydraulic Actuators)
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