Results 31 to 40 of about 51,915 (304)
Network configuration analysis for formation flying satellites [PDF]
2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542), 2002 The performance of two networks to support autonomous multi-spacecraft formation flying systems is presented. Both systems are comprised of a ten-satellite formation, with one of the satellites designated as the central or "mother ship." All data is routed through the mother ship to the terrestrial network.
E.J. Knoblock +3 more
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HYBRID CONSTRAINED FORMATION FLYING CONTROL OF MICRO-SATELLITES
IFAC Proceedings Volumes, 2006 Abstract This paper proposes a centralized solution to the problem of formation reconfiguration and keeping for fleets of satellites in the presence of persistent disturbances and under input-saturation and formation accuracy constraints. Relative position and attitude dynamics are considered.
Bacconi F, Mosca E, CASAVOLA, Alessandro
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Applied SciencesSatellite formation flying technology currently represents a focal point in space mission research. Traditional spacecraft payload performance and lifespan are often constrained by propellant limitations.
Jiaming Wang +3 more
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VIGS as a strategy to reverse aphid wing induction by Y‐satellite RNA of cucumber mosaic virus
FEBS Open Bio, 2023 Y‐satellite RNA (Y‐sat) of cucumber mosaic virus upregulates the expression of the aphid ABCG4 gene, which promotes aphid wing formation. We used ABCG4 virus‐induced gene silencing (VIGS) to prevent the wing‐induction mechanism of Y‐sat and thus ...
Hangil Kim, Chikara Masuta
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Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
Synchronized Position Hold, Engage, Reorient, Experimental Satellites [PDF]
, 2009 Synchronized Position Hold, Engage, Reorient, Experimental Satellites (SPHERES) are bowling-ball sized spherical satellites. They will be used inside the space station to test a set of well-defined instructions for spacecraft performing autonomous ...
Chamitoff, Gregory +4 more
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Advanced Engineering Materials, EarlyView.This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen +3 more
wiley +1 more source
Research on Formation of Microsatellite Communication with Genetic Algorithm
The Scientific World Journal, 2013 For the formation of three microsatellites which fly in the same orbit and perform three-dimensional solid mapping for terra, this paper proposes an optimizing design method of space circular formation order based on improved generic algorithm and ...
Guoqiang Wu, Yuguang Bai, Zhaowei Sun
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Aerospace, 2022 Relative pose estimation of a satellite is an essential task for aerospace missions, such as on-orbit servicing and close proximity formation flying. However, the changeable situation makes precise relative pose estimation difficult.
Sijia Qiao +5 more
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Orbital manoeuvres with single-input control [PDF]
, 2012 We study the problem of orbital control under the constraints on the thrust direction for a nonlinear dynamical model. The satellite is equipped with a passive attitude control system providing one-axis stabilization and a propulsion system consisting ...
Guerman, Anna, Smirnov, Georgi
core