Results 41 to 50 of about 90,052 (317)
Advanced Science, EarlyView.Rod Origami (RodOri) springs harness snap‐through instabilities of pre‐stressed curved rods with geometrically programmable buckling behavior. Integrating RodOri springs with distinct geometries yields multistable metamaterials that undergo stepwise reconfiguration via sequential snapping, achieving wide‐range tunability of stiffness and resonance ...
Jeseung Lee +2 more
wiley +1 more source
Small spacecraft formation-flying using potential functions
, 2008 A group of small spacecraft able to change its orbital formation through using the potential function is discussed. Spacecraft shapes, sizes and manoeuvering capabilities in general are not identical.
Ahmed Badawy +4 more
core +1 more source
Attitude Stabilization of Spacecraft in Very Low Earth Orbit by Center-Of-Mass Shifting [PDF]
, 2019 At very low orbital altitudes (≲450 km) the aerodynamic forces can become major attitude disturbances. Certain missions that would benefit from a very low operational altitude require stable attitudes.
Josep Virgili-Llop +5 more
core +1 more source
Advanced Energy Materials, EarlyView.Metal‐halide perovskite solar cells offer high‐efficiency power for orbital missions but suffer from permanent proton‐induced degradation. This work identifies non‐ionizing energy loss (NIEL) as the primary driver of irreversible failure, inducing atomic displacements and microcracks in the high‐fluence regime. Through energy‐tuned mapping and scalable
Jangwon Byun +10 more
wiley +1 more source
Spacecraft Floating Potential Measurements for the Wind Spacecraft
The Astrophysical Journal Supplement Series, 2023 Abstract Analysis of 8,804,545 electron velocity distribution functions, observed by the Wind spacecraft near 1 au between 2005 January 1 and 2022 January 1, was performed to determine the spacecraft floating potential, ϕ sc. Wind was designed to be electrostatically clean, which helps keep the magnitude of ϕ
Lynn B. Wilson III +2 more
openaire +2 more sources
Predicting Performance of Hall Effect Ion Source Using Machine Learning
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.This study introduces HallNN, a machine learning tool for predicting Hall effect ion source performance using a neural network ensemble trained on data generated from numerical simulations. HallNN provides faster and more accurate predictions than numerical methods and traditional scaling laws, making it valuable for designing and optimizing Hall ...
Jaehong Park +8 more
wiley +1 more source
Study on thermal analysis simulation and test of propellant refueling process for optical module
Xibei Gongye Daxue XuebaoPropellant refueling is important for long-term operation of the optical module in orbit. However, its thermal environment is harsher than on previous missions. Therefore, thermal control of the entire process is required.
LU Wei +4 more
doaj +1 more source
The THESEUS Space Mission and the Infrared Telescope Calibration Unit
Astronomische Nachrichten, EarlyView.ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó +9 more
wiley +1 more source
Journal of Aeronautical Materials, 2016 Damage effects of electron irradiation with different energy on mechanical properties of polyethylene heat-shrinkable sleeves were studied by irradiating the sleeves with 45 keV, 1 MeV and 2 MeV electrons respectively.
LIU Yuming +4 more
doaj +1 more source
Orbit Design Elements of Chang’e 5 Mission
Space: Science & Technology, 2021 The three key orbit design technologies employed in the Chang’e 5 mission are identified and discussed in this paper: orbit design for lunar orbit rendezvous and docking, orbit design for precision lunar landing and inclination optimization, and orbit ...
Zhong-Sheng Wang +3 more
doaj +1 more source