Results 21 to 30 of about 14,403 (267)
Automatika, 2021 We address several problems of coordination and consensus on $ SO(3) $ and $ S^3 $ that can be formulated as minimization problems on these Lie groups.
Aladin Crnkić +3 more
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Determination of Initial Conditions for Satellite Formation Flying in Elliptical Orbits [PDF]
Journal of Astronomy and Space Sciences, 2005 The initial conditions that generate bounded motion in eccentric reference orbit are determined for satellite formation flying. Because Hill's equations cannot describe the relative motion between two satellites in eccentric orbit, a new relative ...
Woo-Kyoung Lee +4 more
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Analytical Solution to relative dynamic of gravity tractors in Formation Flying in Asteroid Deflection Mission [PDF]
فصلنامه علوم و فناوری فضایی, 2019 In this paper, an analytical solution to deflection mission of asteroid as potentially hazardous spatial mass that threat humanity in future is investigated . The mission of deflecting potentially hazardous asteroids in recently years with possibility of
Javad Shams, Jafar Roshanian
doaj
Hardware-in-the-Loop Simulation for Spacecraft Formation Flying
Journal of Control Science and Engineering, 2010 This paper presents a hardware-in-the-loop (HITL) simulation approach for multiple spacecraft formation flying. Considering a leader-follower formation flying configuration, a Fuzzy Logic controller is developed first to maintain the desired formation ...
Jinjun Shan, Piotr Wenderski
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AIP Advances, 2023 The purpose of this study is to evaluate the jamming effectiveness evaluation against monopulse radar when using a non-coherent blinking jamming model at regular intervals based on three aircraft flight trajectories. To begin, the formation trajectory is
Zhaozheng Liu +4 more
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Applied Sciences, 2022 This paper investigates the issues of iterative learning algorithm-based robust thruster fault reconstruction and reconfigurable fault-tolerant control for spacecraft formation flying systems subject to space perturbations.
Yule Gui +3 more
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The Precision Validation of the Precise Baseline Determination for Satellite Formation [PDF]
Journal of Astronomy and Space Sciences, 2011 The needs for satellite formation flying are gradually increasing to perform the advanced space missions in remote sensing and observation of the space or Earth.
Jong-Yeoun Choi, Sang-Jeong Lee
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Drones, 2022 This paper studies the robust formation flying problem for a swarm of drones, which are modeled as uncertain second order systems. By making use of minimal virtual leader information, a fully distributed robust control scheme is proposed, which includes ...
Huanli Gao, Wei Li, He Cai
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By dawn or dusk—how circadian timing rewrites bacterial infection outcomes
FEBS Letters, EarlyView.The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo +2 more
wiley +1 more source
FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source