Results 21 to 30 of about 4,945 (206)

Extended Sliding Mode Observer-Based Output Feedback Control for Motion Tracking of Electro-Hydrostatic Actuators

Mathematics, 2023
This paper develops a novel output feedback control scheme for the motion-tracking problem of an electro-hydrostatic actuator (EHA) in the presence of model uncertainties and external disturbances.
Manh Hung Nguyen, Kyoung Kwan Ahn
doaj   +1 more source

Force Tracking Impedance Control of Hydraulic Series Elastic Actuators Interacting with Unknown Environment

Mathematics, 2022
Force tracking control for hydraulic series elastic actuators (SEAs) is the demand in robots interacting with the surrounding world. However, the inherent nonlinearities and uncertainties of the hydraulic system, as well as the unknown environment, make ...
Yong Nie, Jiajia Liu, Gang Liu, Litong Lyu, Jie Li, Zheng Chen   +5 more
doaj   +1 more source

Designing redundant metering valves for hydraulic actuators under mixability and low cost-constraints [PDF]

, 2010
This article deals with the design of redundant metering valves for mechanically signalled hydraulic actuators. The final aim of the work is to manufacture a new low-cost valve in replacement of the existing expensive valve with an additional leakage ...
Malburet, François, Marger, Thibaut, Maré, Jean-Charles, Pommier-Budinger, Valérie   +3 more
core   +1 more source

Planar digital nanoliter dispensing system based on thermocapillary actuation [PDF]

, 2010
We provide guidelines for the design and operation of a planar digital nanodispensing system based on thermocapillary actuation. Thin metallic microheaters embedded within a chemically patterned glass substrate are electronically activated to generate ...
Anton A. Darhuber, Baroud, Basu, Batchelder, Bogy, Caballero, Chen, Cho, Darhuber, Darhuber, Darhuber, Darhuber, Darhuber, Darhuber, Darhuber, Darhuber, Davis, de Gennes, de Heij, Dussan, Fan, Fang, Friz, Gascoyne, Heller, Jaschke, Jones, Joseph P. Valentino, King, Kotz, Le, Lee, Manz, Meister, Moon, Mugele, Nguon, Nguyen, Oron, Piner, Pollack, Pollack, Rayleigh, Rayleigh, Ren, Sammarco, Sandra M. Troian, Sauer, Schwartz, Sheehan, Singh, Stemme, Strobl, Sun, Tanner, Tomotika, Valentino, Velev, Xu, Yap, Yi   +60 more
core   +2 more sources

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

Set-based approach to passenger aircraft family design [PDF]

, 2016
Presented is a method for the design of passenger aircraft families. Existing point-based methods found in the literature employ sequential approaches in which a single design solution is selected early and is then iteratively modified until all ...
Guenov, Marin D., Molina-Cristobal, Arturo, Riaz, Atif   +2 more
core   +2 more sources

Design of ultraprecision machine tools with application to manufacturing of miniature and micro components [PDF]

, 2005
Currently the underlying necessities for predictability, producibility and productivity remain big issues in ultraprecision machining of miniature/microproducts.
Chen, Dave Webb, EI-Fatatry, Frank Wardle, Gabler, Huang, Ikawa, Kai Cheng, Liu, Luo, McKeown, Nakazawa, Schellekens, Shinno, Slocum, Stephenson, Webster, Weck, Weck, Wybranski, Xichun Luo   +20 more
core   +1 more source

Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator

Actuators, 2020
With the rising demand for energy efficiency, displacement-controlled or so-called pump-controlled systems have become an attractive research topic for applications in construction machinery and other off-road vehicles.
Paolo Casoli, Fabio Scolari, Tatiana Minav, Massimo Rundo   +3 more
doaj   +1 more source

Design and Performance Study for Electrothermally Deep-Sea Drive Microunits Using a Paraffin Phase Change Material

Micromachines, 2021
Considering the further exploration of the ocean, the requirements for deep-sea operation equipment have increased. Many problems existing in the widely used deep-sea hydraulic system have become increasingly prominent. Compared with the traditional deep-
Dayong Ning, Zihao Li, Gangda Liang, Qibo Wang, Weifeng Zou, Yongjun Gong, Jiaoyi Hou   +6 more
doaj   +1 more source

Thermocapillary actuation of liquid flow on chemically patterned surfaces [PDF]

, 2003
We have investigated the thermocapillary flow of a Newtonian liquid on hydrophilic microstripes which are lithographically defined on a hydrophobic surface. The speed of the microstreams is studied as a function of the stripe width w, the applied thermal
Anton A. Darhuber, Bart S. F., Bruin G. J. M., Bunker B. C., Carles P., Cazabat A. M., Cazabat A. M., Darhuber A. A., Darhuber A. A., Davis J. M., Duffy D. C., Fanton X., Fraysse N., Glasbrenner C. J., Jang J., Jeffrey M. Davis, Jones T. B., Kataoka D. E., Landau L., Manz A., Meldrum D., Pollack M. G., Ritchie W., Sammarco T. S., Sandra M. Troian, Sauer B. B., Schwartz L. W., Srinivasan U., Walter W. Reisner   +28 more
core   +2 more sources