Results 31 to 40 of about 10,283 (224)

A NUMERICAL AND EXPERIMENTAL ANALYSIS OF THE DYNAMIC STABILITY OF HYDRAULIC EXCAVATORS

Facta Universitatis. Series: Mechanical Engineering, 2018
The paper presents the results of a numerical and experimental analysis of the dynamic stability of hydraulic excavators. The analysis has employed the software developed on the basis of a defined general dynamic mathematical model of an excavator ...
Dragoslav Janošević, Jovan Pavlović, Vesna Jovanović, Goran Petrović   +3 more
doaj   +1 more source

Energy management in pump-controlled actuators

Frontiers in Mechanical Engineering
Pump-controlled actuators, or more generically, hydrostatic actuators, have the significant advantage of not relying on valves to control the cylinders. This results in much better energy usage compared to traditional valve-controlled systems.
Gustavo Koury Costa, Nariman Sepehri
doaj   +1 more source

Experimental Investigation of an Electro-Hydrostatic Actuator Based on the Novel Active Compensation Method

IEEE Access, 2020
For electro-hydrostatic actuators (EHAs), how to estimate and compensate for the combined effects of the severe nonlinearity caused by inner leakage and friction, the parametric uncertainties of the hydraulic components due to the environment and the ...
Mingkang Wang, Yan Wang, Yongling Fu, Rongrong Yang, Jiang'ao Zhao, Jian Fu   +5 more
doaj   +1 more source

Effect of contact angle hysteresis on thermocapillary droplet actuation [PDF]

, 2005
Open microfluidic devices based on actuation techniques such as electrowetting, dielectrophoresis, or thermocapillary stresses require controlled motion of small liquid droplets on the surface of glass or silicon substrates.
Chen, Jian Z., Darhuber, Anton A., Troian, Sandra M., Wagner, Sigurd   +3 more
core   +1 more source

Media-Free and Contactless Micro-Positioning System Using Ultrasonic Levitation and Magnetic Actuators

Actuators
In micro-production technology (MPT), the demand for ultra-precise machine tools has been steadily increasing. Conventional guideway systems, such as hydrostatic or aerostatic bearings, often face limitations in terms of compactness, media supply, and ...
Berend Denkena, Jörg Wallaschek, Henning Buhl, Jens Twiefel, Chenglong Ding, Zijian Chen   +5 more
doaj   +1 more source

Nonlinear Position Control with Nonlinear Coordinate Transformation Using Only Position Measurement for Single-Rod Electro-Hydrostatic Actuator

Mathematics, 2020
In existing methods, full-state feedback is required for the position tracking of single-rod Electro Hydrostatic Actuators (EHAs). Measuring a full state is not always possible because of cost and space limitations.
Wonhee Kim, Daehee Won
doaj   +1 more source

Ferrofluidic solenoid [PDF]

, 1973
An electromechanical actuator for producing mechanical force and/or motion in response to electrical signals is disclosed. The actuator includes a ferromagnetic fluid and a coil which are contained within an elastomeric capsule.
Sabelman, E. E.
core   +1 more source

A Data Driven Review of In Vitro Electrical and Mechanical Stimulation for Post‐Acute Phase Wound Healing

Advanced Healthcare Materials, EarlyView.
This review examines how in vitro electrical and mechanical stimulation modulates wound healing in fibroblasts and keratinocytes. Analyzing over 560 experimental data points, we relate stimulation parameters to proliferation and migration outcomes, evaluate platform designs, and highlight the need for multi‐parameter optimization to advance targeted ...
Matthew K. Burgess, Ellen F. Marsh, Veronica M. Lucian, Malavika Nair   +3 more
wiley   +1 more source

Miniature photonic-crystal hydrophone optimized for ocean acoustics

, 2010
This work reports on an optical hydrophone that is insensitive to hydrostatic pressure, yet capable of measuring acoustic pressures as low as the background noise in the ocean in a frequency range of 1 Hz to 100 kHz.
Gordon S. Kino, Kim S., Knudsen V. O., Michel J. F. Digonnet, Olav Solgaard, Onur Kilic, Peng G. D., Škvor Z.   +7 more
core   +1 more source

An atomic force microscope operating at hypergravity for in situ measurement of cellular mechano-response [PDF]

, 2009
We present a novel atomic force microscope (AFM) system, operational in liquid at variable gravity, dedicated to image cell shape changes of cells in vitro under hypergravity conditions. The hypergravity AFM is realized by mounting a stand-alone AFM into
Hulst, N.F. van, Jong, H.H.A. de, Korterik, J.P., Laar, M.C. van, Loon, J.J.W.A. van, Segerink, F.B., Wubbels, R.J.   +6 more
core   +2 more sources