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Actuators
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Advances in Fluid Power Systems and Actuators
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Advances in Fluid Power Systems and Actuators

A special issue of Actuators (ISSN 2076-0825). This special issue belongs to the section "High Torque/Power Density Actuators".

Deadline for manuscript submissions: 30 November 2025 | Viewed by 1590

Special Issue Editors

Dr. Mercè Garcia-Vilchez

E-Mail Website
Guest Editor
CATMech—Department of Fluid Mechanics, Universitat Politecnica de Catalunya, ES-08222 Terrassa, Catalunya, Spain
Interests: fluid power; computational fluid dynamics (CFD); experimental characterization; energy efficiency; flow visualization; design software; control design
Dr. Pedro Javier Gamez-Montero

E-Mail Website
Guest Editor
CATMech—Department of Fluid Mechanics, Universitat Politecnica de Catalunya, ES-08222 Terrassa, Catalunya, Spain
Interests: fluid power; gerotor; design tools; mechanical dynamics; bond graph; numerical simulation; CFD; experimental techniques; PIV
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The aim of this Special Issue on "Advances in Fluid Power Systems and Actuators" is to contribute to the current body of knowledge by sharing the latest developments in fluid power technology, that is, the transmission of forces and motions using a confined and pressurized fluid with its main overall merit of density power. This Special Issue includes a broad range of subjects, including the following:

  • New methodologies for the analysis, modeling, simulation, and design of hydraulic and pneumatic components;
  • Advanced configurations and design for hydrostatic pumps and motors;
  • New configurations and design solutions for hydraulic valves and actuators;
  • New experimental approaches and techniques in hydraulic and pneumatic components;
  • Component sizing and manufacturing techniques in fluid power components;
  • New materials in fluid power components;
  • Advanced system configuration in mobile and industrial fluid power;
  • Applications of fluid power in the field of hydrostatic, hybrid, and power split transmissions;
  • Energy rating in fluid power systems;
  • Monitoring, fault detection, and life reliability in fluid power components;
  • Design by end-user: diagnosis, prognostic, and energy consumption evaluation;
  • Hydraulic drives and actuators in powered prosthetics;
  • Noise and vibration in hydraulic components and systems.

Dr. Mercè Garcia-Vilchez
Dr. Pedro Javier Gamez-Montero
Guest Editors

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

  • fluid power
  • simulation
  • hydraulics
  • mechanical design
  • manufacturing
  • experimental techniques
  • fault detection
  • noise
  • vibration

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Published Papers (3 papers)

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Research

24 pages, 6824 KB  
Article
Analytical Modeling and Simulation of Machinery Containing Hydraulic Lines with Fluid Transients
by David Hullender
Actuators 2025, 14(10), 489; https://doi.org/10.3390/act14100489 - 9 Oct 2025
Viewed by 106
Abstract
In industrial equipment containing hydraulic lines for power transmission, the lines have boundary conditions defined by components such as pumps, valves, and actuators located at the ends of the lines. Sudden changes in any of the boundary conditions may result in significant pressure/flow [...] Read more.
In industrial equipment containing hydraulic lines for power transmission, the lines have boundary conditions defined by components such as pumps, valves, and actuators located at the ends of the lines. Sudden changes in any of the boundary conditions may result in significant pressure/flow dynamics (fluid transients) in the lines that may be detrimental or favorable to the performance of the equipment. Accurate models for line transients are defined by the exact solution to a set of simultaneous partial differential equations. In this paper, analytical solutions to the partial differential equations provide Laplace transform transfer functions applicable to any set of boundary conditions yet to be specified that satisfy the requirements of causality. Analytical solutions of these partial differential equations from previous publications are reviewed for cases of laminar and turbulent flow for Newtonian and a class of non-Newtonian fluids. This paper focuses on a method for obtaining total system analytical models and time domain solutions for cases in which the end-of-line components can be modeled with linear equations for perturbations relative to pre-transient flow conditions. Examples with pumps, valves, and actuators demonstrate the process of coupling equations for components at the ends of a line to obtain total system transfer functions and then obtain time domain solutions for outputs of interest associated with system inputs and load variations. Full article
(This article belongs to the Special Issue Advances in Fluid Power Systems and Actuators)
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21 pages, 6240 KB  
Article
Real-Time Gain Scheduling Controller for Axial Piston Pump Based on LPV Model
by Alexander Mitov, Tsonyo Slavov and Jordan Kralev
Actuators 2025, 14(9), 421; https://doi.org/10.3390/act14090421 - 29 Aug 2025
Viewed by 669
Abstract
This article is devoted to the design of a real-time gain scheduling (adaptive) proportional–integral (PI) controller for the displacement volume regulation of a swash plate-type axial piston pump. The pump is intended for open circuit hydraulic drive applications without “secondary control”. In this [...] Read more.
This article is devoted to the design of a real-time gain scheduling (adaptive) proportional–integral (PI) controller for the displacement volume regulation of a swash plate-type axial piston pump. The pump is intended for open circuit hydraulic drive applications without “secondary control”. In this type of pump, the displacement volume depends on the swash plate swivel angle. The swash plate is actuated by a hydraulic-driven mechanism. The classical control device is a hydro-mechanical type, which can realize different control laws (by pressure, flow rate, or power). In the present development, it is replaced by an electro-hydraulic proportional spool valve, which controls the swash plate-actuating mechanism. The designed digital gain scheduling controller evaluates control signal values applied to the proportional valve. The digital controller is based on the new linear parameter-varying mathematical model. This model is estimated and validated from experimental data for various loading modes by an identification procedure. The controller is implemented by a rapid prototyping system, and various real-time loading experiments are performed. The obtained results with the gain scheduling PI controller are compared with those obtained by other classical PI controllers. The developed control system achieves appropriate control performance for a wide working mode of the axial piston pump. The comparison analyses of the experimental results showed the advantages of the adaptive PI controller and confirmed the possibility for its implementation in a real-time control system of different types of variable displacement pumps. Full article
(This article belongs to the Special Issue Advances in Fluid Power Systems and Actuators)
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23 pages, 9338 KB  
Article
Numerical Investigation of the Tribological Performance of Surface-Textured Bushings in External Gear Pumps Under Transient Lubrication Conditions
by Paolo Casoli, Masoud Hatami Garousi, Massimo Rundo and Carlo Maria Vescovini
Actuators 2025, 14(7), 345; https://doi.org/10.3390/act14070345 - 11 Jul 2025
Viewed by 409
Abstract
This study presents a computational fluid dynamics (CFDs) investigation of the hydrodynamic behavior of surface-textured lateral bushings in external gear pumps (EGPs), emphasizing the effects of combined sliding and squeezing motions within the lubrication gap. A comprehensive numerical model was developed to analyze [...] Read more.
This study presents a computational fluid dynamics (CFDs) investigation of the hydrodynamic behavior of surface-textured lateral bushings in external gear pumps (EGPs), emphasizing the effects of combined sliding and squeezing motions within the lubrication gap. A comprehensive numerical model was developed to analyze how surface texturing implemented through different dimple shapes and texture densities influences pressure distribution and load-carrying capacity under transient lubrication conditions. The analysis demonstrates that the interaction between shear-driven flow and squeeze-film compression significantly amplifies pressure, particularly when optimal dimple configurations are applied. Results indicate that dimple geometry, depth, and arrangement critically influence hydrodynamic performance, while excessive texturing reduces effectiveness due to increased average gap height. Cavitation was intentionally not modeled in the early single dimple evaluations to allow clear comparison between configurations. The findings offer a design guideline for employing surface textures to enhance tribological performance and efficiency in EGP applications under realistic dynamic conditions. Full article
(This article belongs to the Special Issue Advances in Fluid Power Systems and Actuators)
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