Results 321 to 330 of about 405,081 (406)
Spacecraft charging - An update [PDF]
34th Aerospace Sciences Meeting and Exhibit, 1996 Summary form only given. Nearly twenty years after the landmark SCATHA program, spacecraft charging and its associated plasma interactions continue to be major issues for Earth-orbiting spacecraft. Although typically thought of as a surface effect on geosynchronous spacecraft, internal charging and low-altitude phenomena are increasingly causing ...
Henry B. Garrett, A.C. Whittlesey
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Deep Learning Techniques for Autonomous Spacecraft Guidance During Proximity Operations
Journal of Spacecraft and Rockets, 2021This paper investigates the use of deep learning techniques for real-time optimal spacecraft guidance during terminal rendezvous maneuvers, in presence of both operational constraints and stochasti...
Lorenzo Federici +2 more
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Faster Fixed-Time Control of Flexible Spacecraft Attitude Stabilization
IEEE Transactions on Industrial Informatics, 2020The rapid attitude stabilization problem of flexible spacecraft with uncertain inertia and disturbances is investigated. In this article, a sliding mode-based fixed-time control approach is presented with a new fixed-time surface ensuring a faster ...
Lu Cao +3 more
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Neural Network-Based Pose Estimation for Noncooperative Spacecraft Rendezvous
IEEE Transactions on Aerospace and Electronic Systems, 2020This article presents the Spacecraft Pose Network (SPN), the first neural network-based method for on-board estimation of the pose, i.e., the relative position and attitude, of a known noncooperative spacecraft using monocular vision.
Sumant Sharma, S. D’Amico
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Science, 1971 Some consequences of Newtonian mechanics, previously overlooked, result in a new understanding of the behavior of small bodies in the solar system. Collisions between such bodies lead not to a scattering of these bodies over an increasing volume but instead to a contraction resulting in a "jet stream," with application to meteor streams and streams of ...
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Space Science Reviews, 2011
The Dawn spacecraft is designed to travel to and operate in orbit around the two largest main belt asteroids, Vesta and Ceres. Developed to meet a ten-year life and fully redundant, the spacecraft accommodates an ion propulsion system, including three ion engines and xenon propellant tank, utilizes large solar arrays to power the engines, carries the ...
W. Michael Chiville +12 more
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The Dawn spacecraft is designed to travel to and operate in orbit around the two largest main belt asteroids, Vesta and Ceres. Developed to meet a ten-year life and fully redundant, the spacecraft accommodates an ion propulsion system, including three ion engines and xenon propellant tank, utilizes large solar arrays to power the engines, carries the ...
W. Michael Chiville +12 more
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Spacecraft charging and ion wake formation in the near-Sun environment [PDF]
Physics of Plasmas, 2010 A three-dimensional (3-D), self-consistent code is employed to solve for the static potential structure surrounding a spacecraft in a high photoelectron environment.
David M Malaspina, F S Mozer, J R Wygant
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Modeling and Observer-Based Vibration Control of a Flexible Spacecraft With External Disturbances
IEEE transactions on industrial electronics (1982. Print), 2019This paper outlines the vibration reduction of a spacecraft with flexible appendage subject to external disturbances. The hybrid dynamic model of the spacecraft is described by both partial differential equations and ordinary differential equations.
Y. Liu, Yun Fu, Wei He, Qing Hui
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Fixed-Time Attitude Tracking Control for Rigid Spacecraft Without Angular Velocity Measurements
IEEE transactions on industrial electronics (1982. Print), 2020This article considers the problem of velocity-free fixed-time attitude tracking control for rigid spacecraft. With the help of the homogeneity theorem, a semiglobal observer is introduced to estimate the unmeasured angular velocities within fixed time ...
An‐Min Zou, Zhun Fan
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A survey on artificial intelligence trends in spacecraft guidance dynamics and control
Astrodynamics, 2018The rapid developments of artificial intelligence in the last decade are influencing aerospace engineering to a great extent and research in this context is proliferating.
D. Izzo, Marcus Märtens, Binfeng Pan
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