Results 61 to 70 of about 383,072 (432)
Advanced Science, EarlyView.This study presents an ionic conductive hydrogel (ICH) with excellent conductivity, self‐healing, self‐adhesion, and long‐term stability under extreme cold conditions. It shows significant potential for non‐invasive, continuous health monitoring, conformally adhering to skin without signal crosstalk, enabling real‐time, high‐fidelity signal ...
Fei Han +12 more
wiley +1 more source
Advanced Science, EarlyView.The anisotropic‐structure SiC@SiO2 ceramic fiber aerogels feature aligned layers stacking layer‐by‐layer with the same direction and highly oriented 1D fibers inside each layer, resulting in an anisotropy factor as high as 5.08. Not only does it have 60% high recoverable deformation, but it also shows great promise for thermal protection in extreme ...
Zheng Zhang +7 more
wiley +1 more source
Space Weather, Volume 20, Issue 12, December 2022., 2022 Abstract Directional drilling in the oil fields relies particularly on the “on‐fly” measurements of the natural magnetic field (measurements while drilling; MWD); the MWD are eventually used to construct the well path. These measurements are the superposition of the signals from the internal, core and crustal, and external, ionospheric and ...
Mikhail Kruglyakov +2 more
wiley +1 more source
Reconfiguration of a satellite constellation in circular formation orbit with decentralized model predictive control [PDF]
arXiv, 2022 Satellite constellation missions, consisting of a large number of spacecraft, are increasingly being launched or planned. Such missions require novel control approaches, in particular for what concerns orbital phasing maneuvers. In this context, we consider the problem of reconfiguration of a satellite constellation in a circular formation.
arxiv
Docking and retrieval mechanism [PDF]
, 1977 An engineering prototype docking and retrieval mechanism (DRM) which enables two spacecraft to dock and be structurally joined on-orbit is described.
Spencer, R. A., Tewell, J. R.
core +2 more sources
Space Propulsion Technology for Small Spacecraft
Proceedings of the IEEE, 2018 As small satellites become more popular and capable, strategies to provide in-space propulsion increase in importance. Applications range from orbital changes and maintenance, attitude control and desaturation of reaction wheels to drag compensation and ...
D. Krejci, P. Lozano
semanticscholar +1 more source
On the Spatial Coherence of Magnetic Ejecta: Measurements of Coronal Mass Ejections by Multiple Spacecraft Longitudinally Separated by 0.01 au [PDF]
Astrophysical Journal, 2018 Measurements of coronal mass ejections (CMEs) by multiple spacecraft at small radial separations but larger longitudinal separations is one of the ways to learn about the three-dimensional structure of CMEs.
N. Lugaz +7 more
semanticscholar +1 more source
Compliant Robotics in Space: A Prospective Review of Soft and Deformable Systems for Space Missions
Advanced Intelligent Systems, EarlyView.Compliant robots are increasingly becoming integral to space exploration due to their adaptability, flexibility, and lightweight design. This article reviews categories such as soft, reconfigurable, and hyper‐redundant robots and their evolving role in enhancing space missions.
Hamed Rahimi Nohooji, Holger Voos
wiley +1 more source
IET Control Theory &Applications, Volume 17, Issue 1, Page 19-38, January 2023., 2023 Abstract This paper investigates the problem of anti‐disturbance fault estimation and attitude tracking fault tolerant control for a flexible spacecraft subject to actuator faults, external disturbances, input saturation, and configuration misalignment.
Yanbo Li, Wei Xu, Lin Chang
wiley +1 more source
Active spacecraft potential control system selection for the Jupiter orbiter with probe mission [PDF]
, 1977 It is shown that the high flux of energetic plasma electrons and the reduced photoemission rate in the Jovian environment can result in the spacecraft developing a large negative potential.
Beattie, J. R., Goldstein, R.
core +1 more source