Results 121 to 130 of about 1,549,833 (399)

The Application of Optimising Control to an Hydraulic Drive

Measurement and Control, 1973
An extremum control system has been designed to maximise the transmission efficiency of an hydraulic drive. The system is of the type which use a periodic perturbation of the control signal to generate the control action. Analysis of the system shows that an optimum choice of parameters may be made to maximise the rate of tracking of a moving extremum
openaire   +3 more sources

Autonomous Seeding of Microparticles on the Inner Surface of Polymer Hollow Microfibers Using Hydrodynamic Forces

Advanced Materials Interfaces, EarlyView.
Microparticle displacement in viscoelastic PEGalginate co‐flows was utilized to fabricate alginate hollow microfibers. Increasing alginate concentration and core flow enhanced confinement and nearly doubled seeding density, providing a simple microfluidic strategy for efficient biofabrication, cellular seeding, and tissue engineering applications ...
Saurabh S. Aykar, Nicole N. Hashemi
wiley   +1 more source

On Cavitation in the Hydraulic Drives of Mobile Machines

IOP Conference Series: Earth and Environmental Science, 2021
Abstract The paper considers the processes and conditions for the occurrence of cavitation in the hydraulic drive of the work equipment hoisting mechanism and closed-loop pulse hydraulic systems. A dynamic system of an oscillatory scrapper of compacted snow and ice is developed; a mathematical model and a numerical solution are provided.
openaire   +2 more sources

High-Accuracy Force Control With Nonlinear Feedforward Compensation for a Hydraulic Drive Unit

IEEE Access, 2019
The hydraulic drive unit (HDU) applied in a hydraulic drive legged robot joints adopts an outer loop impedance control method based on the hydraulic control’s inner loop during motion so that the entire system obtains certain compliance characteristics ...
Bin Yu, Ruidong Liu, Qixin Zhu, Zhipeng Huang, Zhengguo Jin, Xiangji Wang   +5 more
semanticscholar   +1 more source

Reduced Passivity and Enhanced Pitting Around Crack Tip Measured Using Scanning Electrochemical Cell Microscopy

Advanced Materials Interfaces, EarlyView.
High‐resolution scanning electrochemical cell microscopy (SECCM) mapping shows that plastic deformation near fatigue cracks in CA6NM stainless steel progressively reduces passivity and increases pitting susceptibility. This work reveals how mechanical stress drives localized corrosion in corrosion‐fatigue conditions.
Sarah R. Yassine, Egor Katkov, Sarah Blunk, Pierre‐Antony Deschênes, Robert Lacasse, Janine Mauzeroll   +5 more
wiley   +1 more source

Energy Efficiency Analysis of Hydraulic Excavators’ Swing Drive Transmission

Machines
The paper provides an analysis of the energy efficiency of the swing drive system of hydraulic excavators, which integrally includes a hydraulic motor and a planetary reducer.
Vesna Jovanović, Dragoslav Janošević, Dragan Marinković, Nikola Petrović, Boban Nikolić   +4 more
doaj   +1 more source

Metal spinning of axially symmetric parts using proportional electro-hydraulic drive with tracking system [PDF]

, 2015
В роботі розглянуті методи та верстатне обладнання для виконання процесу ротаційної витяжки. Запропоновано застосувати для виконання процесу ротаційної витяжки електрогідравлічний привод зі стежною системою, що дає можливість виготовляти деталі на ...
Lozinskyi, D. O., Pylyavets, V. G., Shevchuk, Y. I., Sivak, I. O., Лозинский, Д. А., Лозінський, Д. О., Пилявец, В. Г., Пилявець, В. Г., Сивак, И. О., Сивак, І. О., Шевчук, Е. И., Шевчук, Є. І.   +11 more
core  

Mathematical model of hydromanipulator of forest vehicle with recuperative hydraulic drive

IOP Conference Series: Earth and Environment, 2019
The relevance of using a recuperative hydraulic drive to control the hydraulic manipulator of a timber truck used in conducting selective sanitary cutting of forest care has been substantiated.
V. Nikonov, V. Posmetev, V. Posmetev
semanticscholar   +1 more source

Investigation on Regularities of Self‐Healing Breakdown in Metallized Film Capacitors for AC Application

Advanced Materials Interfaces, EarlyView.
Self‐healing capacitors, with advantages of high operating voltage, great energy density, and environmental friendliness, are widely used in power system. The electrodes of the capacitors consist of a nanometer‐thick metal layer on polypropylene films, granting them a unique self‐healing capability.
Fei Yan, Jiao Zhou, Xiang Huang, Huiwen He, Qiaogen Zhang   +4 more
wiley   +1 more source

Bionic Design and Optimization on the Flow Channel of a Legged Robot Joint Hydraulic Drive Unit Based on Additive Manufacturing. [PDF]

Biomimetics (Basel), 2023
Huang Z, Du C, Wang C, Sun Q, Xu Y, Shao L, Yu B, Ma G, Kong X.   +8 more
europepmc   +1 more source