Results 91 to 100 of about 250,590 (188)

Solution of the dark matter riddle within standard model physics: from black holes, galaxies and clusters to cosmology

Frontiers in Astronomy and Space Sciences
It is postulated that the energy density of the (quantum) vacuum acts firstly as dark energy and secondly as a part of dark matter. Assisted by electric fields arising from a small charge mismatch in the cosmic plasma, it can condense on mass ...
Theodorus Maria Nieuwenhuizen
doaj   +1 more source

One Innovative Method for Improving the Power Density and Efficiency of Electro-Hydrostatic Actuators

Actuators
Although electro-hydrostatic actuators (EHAs) hold broad application prospects in more-electric aircraft and high-end equipment, they face a difficult trade-off between dynamic response and energy efficiency.
Zhenfei Ling, Fengqi Zhou, Hao Liu, Bo Yang, Xiaoping Ouyang   +4 more
doaj   +1 more source

LOS PROPIETARIOS DE ELECTRO MODERNO [Material gráfico] [PDF]

, 1936
FOTO DE FACHADA DE ELECTRO MODERNO EN CALLE TRIANACopia digital. Madrid : Ministerio de Educación, Cultura y Deporte.
Electro Moderno
core  

A Systematic Literature Review on PHM Strategies for (Hydraulic) Primary Flight Control Actuation Systems

Actuators
Prognostic and Health Management (PHM) strategies are gaining increasingly more traction in almost every field of engineering, offering stakeholders advanced capabilities in system monitoring, anomaly detection, and predictive maintenance. Primary flight
Leonardo Baldo, Andrea De Martin, Giovanni Jacazio, Massimo Sorli   +3 more
doaj   +1 more source

Fault Detection in an Electro-Hydrostatic Actuator Using Polyscale Complexity Measures and Bayesian Classification

IEEE Open Journal of Instrumentation and Measurement
This article presents a novel approach for fault detection in a hydraulic actuation system. The fault of interest is the internal leakage of the actuator, which may often be caused by the wearing down of the piston seal.
Soleiman Hosseinpour, Witold Kinsner, Saman Muthukumarana, Nariman Sepehri   +3 more
doaj   +1 more source

Supplemental material for Novel dual-redundancy electro-hydrostatic actuator research and controller design

, 2019
Supplemental Material for Novel dual-redundancy electro-hydrostatic actuator research and controller design by Wending Li and Guanglin Shi in Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering ...
Wending Li (3499409), Guanglin Shi (6846095)   +1 more
core   +1 more source

Adaptive Dead Zone Compensation Control Method for Electro-Hydrostatic Actuators Under Low-Speed Conditions

Chinese Journal of Mechanical Engineering
This study proposes an accurate dead zone compensation control method for electro-hydrostatic actuators (EHAs) under low-speed conditions. Specifically, the nonlinear dead zone characteristics under low-speed conditions are summarized based on numerous ...
Haoyi Jiang, Zhenfei Ling, Fengqi Zhou, Maowen Sun, Hao Liu, Lilin Xu, Yeming Yao, Xiaoping Ouyang, Huayong Yang   +8 more
doaj   +1 more source

A Hybrid Swing-Assistive Electro-Hydrostatic Bionic Knee Design

2022 9th IEEE RAS/EMBS International Conference for Biomedical Robotics and Biomechatronics (BioRob), 2022
Marco Puliti, Federico Tessari, Renato Galluzzi, Simone Traverso, Andrea Tonoli, Lorenzo De Michieli, Matteo Laffranchi   +6 more
openaire   +2 more sources

Position tracking control of electro-hydrostatic actuators via adaptive finite-time backstepping and state observation. [PDF]

Sci Rep
Phan VD, Nguyen HL, Le VC, Ahn KK.
europepmc   +1 more source

Nonlinear flow modeling of electro hydrostatic pump unit based on Gauss Newton iterative method for high performance control. [PDF]

Sci Rep
Zhang T, Yan G, Liu X, Yao C, Ai C.
europepmc   +1 more source