Results 211 to 220 of about 14,403 (267)

Formation-flying interferometry

SPIE Proceedings, 2003
There are many advantages to space-based interferometry, but monolithic, single-spacecraft platforms set limits on the collecting area and baseline length. These constraints can be overcome by distributing the optical elements of the interferometer over a system of multiple spacecraft flying in precise formation, opening up new realms of angular ...
Oliver P. Lay, Gary H. Blackwood
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Technology validation of the autonomous formation flying sensor for precision formation flying

2003 IEEE Aerospace Conference Proceedings (Cat. No.03TH8652), 2004
A Radio Frequency (RF) based sensor, called the Autonomous Formation Flying (AFF) sensor, has been developed to enable deep space precision formation flying by measuring the relative range and bearing angles between multiple spacecraft. The AFF sensor operates at Ka-band and uses signal-processing schemes inherited from the Global Positioning System ...
J.Y. Tien, G.H. Purcell, L.R. Amaro, L.E. Young, null Mimi Aung, J.M. Srinivasan, E.D. Archer, A.M. Vozoff, null Yong Chong   +8 more
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Spacecraft Formation Flying

2012
Spacecraft formation flying is an important application of networked dynamical systems. Attitude control of the spacecraft is an indispensable (many applications place strict requirements on it) and difficult (due to the nonlinear dynamics) problem being studied for decades.
Ziyang Meng, Tao Yang, Karl H. Johansson
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Formation Flying Satellites: Control By an Astrodynamicist

Celestial Mechanics and Dynamical Astronomy, 2001
Potential periodic formation orbits can be identified using Hill's equation. However, as gravitational perturbations destroy the periodicity, a control is required to maintain the desired orbits. Here, the authors address the control of individual satellites as well as the control of the whole constellation.
Alfriend, Kyle T., Vadali, Srinivas R., Schaub, Hanspeter   +2 more
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Optimal Reconfiguration Manoeuvres in Formation Flying Missions

2021 IEEE Aerospace Conference (50100), 2021
Most of the current formation flying systems are intended to work in a single, stable orbital configuration acquired shortly after the launch. However, the formation flying concept lends itself to be used in a flexible manner, by introducing the possibility of changing the relative configuration of the platforms, i.e.
Dharmarajan, K., Palmerini, G. B.
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Satellite Formation Flying Maneuver Control

Mekhatronika, Avtomatizatsiya, Upravlenie, 2019
A problem of a formation flying satellites maneuver control is presented. Among the most important criteria for satellite formation flying control system are active period maximization, precision of the configuration, secure motion (without collisions of satellites).
M. V. Palkin, I. P. Titkov
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Formation flying in elliptical orbits

2000 IEEE Aerospace Conference. Proceedings (Cat. No.00TH8484), 2002
We present a general approach to the analysis of the formation flying problem, based on FreeFlyer(R) and MATLAB(R), that is designed with spacecraft formations in mind. With this approach, we are able to quickly combine new algorithms for the initialization and control of a formation within the context of a high-fidelity operational tool. As an example,
C. Schiff, D. Rohrbaugh, J. Bristow
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A formation flying technology vision

Space 2000 Conference and Exposition, 2000
Formation Flying is revolutionizing Earth and Space science and the way the space community conducts science missions. This technological transformation provides new, innovative techniques in spacecraft guidance, navigation, and control, and how the science community gathers and shares information between space vehicles and the ground.
John Bristow, David Folta, Kate Hartman
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Visual, cruise formation flying dynamics

Atmospheric Flight Mechanics Conference, 2000
In order to develop a performance baseline for future cooperative, dual aircraft operations, an experimental evaluation of pilot-in-the-loop, dual aircraft system dynamics in visual meteorological conditions (VMC) was undertaken to examine pilot response time and system frequency response characteristics. Stanford University flew a Beechcraft Queen Air
Sharon Houck, J. Powell
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Formation Flying for Distributed InSAR

AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2006
We consider two spacecraft flying in formation to create interferometric synthetic aperture radar (InSAR). Several candidate orbits for such in InSar formation have been previously determined based on radar performance and Keplerian orbital dynamics. However, with out active control, disturbance-induced drift can degrade radar performance and (in the ...
Daniel Scharf, Emmanuell Murray, Scott Ploen, Konstantin Gromov, Curtis Chen   +4 more
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