Results 101 to 110 of about 810,336 (297)

Disturbance-observer-based high precision control of small reaction flywheels

Dianzi Jishu Yingyong
Reaction flywheels is a key component of the satellite attitude control system, and its performance is directly related to the control accuracy of optical remote sensing satellites.
Shen Ying, Zhang Xiaolei, Kong Lingbo, Hu Huiying   +3 more
doaj   +1 more source

Influence of TiC and TiN Ceramic Reinforcements on the Microstructure, Thermal Expansion Behavior, and Tensile Properties of Invar 36 Manufactured by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This study examines Invar composites reinforced with titanium carbide (TiC) and titanium nitride (TiN) using laser powder bed fusion (LPBF). It presents the influence of reinforcements on microstructure, tensile properties, and thermal expansion. Results show that TiC effectively strengthens Invar while maintaining low thermal expansion, whereas TiN ...
Ayodeji Nathaniel Oyedeji, Natasha Sacks, Johannes Pötschke, Björn Matthey   +3 more
wiley   +1 more source

Design of S-band conical Archimedean spiral antenna

Dianzi Jishu Yingyong
According to the communication requirements of the satellite S-band Tracking, Telemetry and Command system (TT&C), a conical Archimedean spiral antenna with wideband and high gain circular polarization is designed for the S-band.
Huang Zhenkui, Xing Sirui, Shen Chenyang, Sui Tao, An Xiangdong   +4 more
doaj   +1 more source

On inertial navigation and attitude initialization in polar areas

Satellite Navigation, 2020
Inertial navigation and attitude initialization in polar areas become a hot topic in recent years in the navigation community, as the widely-used navigation mechanization of the local level frame encounters the inherent singularity when the latitude ...
Yuanxin Wu, Chao He, Gang Liu
doaj   +1 more source

Feasibility and Limitations of the Advanced Replica Process for Bioactive Glasses

Advanced Engineering Materials, EarlyView.
Periodic 3D‐printed Kelvin‐cell templates enable a controlled advanced replica process for fabricating highly porous glass lattices. Across P45K9, 45S5, and 13–93, material‐dependent differences in coating, burnout, and shrinkage lead to distinct strut morphologies, while comparable final porosities of 83%–88% are retained.
Swantje Funk, Elisabeth Keck, Alberto López‐Grande, Delia S. Brauer, Tobias Fey   +4 more
wiley   +1 more source

Architectures and protocols for an integrated satellite-terrestrial mobile system [PDF]

, 1993
This paper aims to depict some basic concepts related to the definition of an integrated system for mobile communications, consisting of a satellite network and a terrestrial cellular network.
F. SETTIMO, DELLI PRISCOLI, Francesco, P. IANNUCCI, Menolascino, R., R. MENOLASCINO, E. DEL RE, Delre, E., Iannucci, P., Settimo, F., Dellipriscoli, F.   +9 more
core  

Some implications of sampling choices on comparisons between satellite and model aerosol optical depth fields [PDF]

, 2010
The comparison of satellite and model aerosol optical depth (AOD) fields provides useful information on the strengths and weaknesses of both. However, the sampling of satellite and models is very different and some subjective decisions about data ...
P. I. Palmer, Grainger, R. G., Palmer PI, Grainger RG, Palmer, P. I., A. M. Sayer, Thomas, GE, Sayer AM, Sayer, AM, Palmer, PI, Thomas, Gareth, Thomas, G. E., Thomas GE, Sayer, A. M., Grainger, Roy, Grainger, RG, G. E. Thomas, R. G. Grainger, Palmer, Paul   +18 more
core   +2 more sources

Investigating the Low‐Temperature Phase Stability of the Binary Ta–W System

Advanced Engineering Materials, EarlyView.
Atomistic simulations show that the binary Ta–W system forms ordered intermetallic phases, B2‐TaW and D03‐TaW3, as 0 K ground states. Configurational entropy, however, lowers the free energy of the disordered bcc solid solution, which becomes the stable phase above about 400 K.
Klemens Lechner, Anna Sophie Jelinek, Velislava Terziyska, Peter Wagatha, Wolfram Knabl, Christian Mitterer, Helmut Clemens, David Holec   +7 more
wiley   +1 more source

FastNano Liquid: An Automated Platform for Small‐Angle X‐ray Scattering‐Based Materials Discovery

Advanced Engineering Materials, EarlyView.
We present FastNano Liquid, an automated small‐ and wide‐angle X‐ray scattering platform for the combined synthesis and characterization of (nano)materials. The platform is coupled to varied reactor workflows for both in situ studies of reaction kinetics and ex situ screening of synthesis conditions to support machine learning‐guided exploration ...
Pierre‐Baptiste Flandrin, Émeline Cournède, Jens Krarup, Michael Lesa, Foyzul Hasan, Amandine Séné, Arnaud Lahouati, David Benhaiem, Jérémie‐Luc Sanchez, Simon Delacroix, Thierry Gacoin, Fabienne Testard, Damien Faivre, David Carriere, Corinne Chevallard, Olivier Taché, Mark A. Levenstein   +16 more
wiley   +1 more source

Drag-free and attitude control for the GOCE satellite [PDF]

, 2008
The paper concerns Drag-Free and Attitude Control of the European satellite Gravity field and steady-state Ocean Circulation Explorer (GOCE) during the science phase.
Canuto, Enrico
core   +1 more source