Results 221 to 230 of about 1,149 (246)

Local Estimators for Multiple Spacecraft Formation Flying

AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2008
In this work, we propose an approach to formation estimation that is based on local estimators for multiple spacecraft systems. In this avenue, we proceed to relax some of the assumptions in the existing research literature pertaining to feasible estimation architectures for formation flying.
Marzieh Nabi, Mehran Mesbahi, Nanaz Fathpour, Fred Hadaegh   +3 more
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Deep Space Formation Flying Spacecraft Path Planning

The International Journal of Robotics Research, 2007
Efficient algorithms for collision-free energy sub-optimal path planning for formations of spacecraft flying in deep space are presented. The idea is to introduce a set of way-points through which the spacecraft are required to pass, combined with parameterizations of the trajectories which are energy-optimal for each spacecraft.
Cornel Sultan, Sanjeev Seereram, Raman K. Mehra   +2 more
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Decentralized Estimation Algorithms for Formation Flying Spacecraft

AIAA Guidance, Navigation, and Control Conference and Exhibit, 2003
Several space missions are being planned with large fleets of spacecraft at GEO and beyond where relative navigation using GPS will either be impossible or insufficient. Onboard local ranging devices will be required to replace or augment the available GPS measurements to perform relative navigation for these missions.
Philip Ferguson, Jonathan How
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Science Operations Planning Optimization for Spacecraft Formation Flying Maneuvers

Journal of Spacecraft and Rockets, 2009
The use of formation flying of distributed space systems, especially for space-based interferometry, is receiving much attention by mission designers. Optimal maneuver planning for these missions is critical to ensure the safe operation of the spacecraft and to maximize the mission science returns. One such mission, Darwin, requires complex observation
Roberts, Peter, Burgon, R., Roberts, J. A., Ankersen, F.   +3 more
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Backstepping sliding mode control for formation flying spacecraft

Aircraft Engineering and Aerospace Technology, 2018
Purpose This paper aims to investigate the problem of finite-time consensus tracking control without unwinding for formation flying spacecraft in the presence of external disturbances. Design/methodology/approach Two distributed finite-time controllers are developed using the backstepping sliding mode.
Yong Guo, Shen-Min Song, Xue-Hui Li
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Distributed attitude alignment in spacecraft formation flying

International Journal of Adaptive Control and Signal Processing, 2006
AbstractIn this paper, we consider a distributed attitude alignment problem for a team of deep space formation flying spacecraft through local information exchange. We propose control laws for three different cases. In the first case, multiple spacecraft converge to their (possibly time‐varying) desired attitudes while maintaining the same attitude or ...
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Guidance and Control of Formation Flying Spacecraft

2008
A key element of NASA’s future space exploration is high precision formation flying (FF) for space interferometry. Precision FF has never been attempted before and poses new and significant challenges to the underlying control system. While the guidance and control (G&C) methodologies of single spacecraft for traditional planetary flyby and orbiter ...
Fred Y. Hadaegh, Singh Gurkirpal, Behcet Açikmeşe, Daniel P. Scharf, Milan Mandić   +4 more
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Distributed Attitude Coordination Control for Spacecraft Formation Flying

IEEE Transactions on Aerospace and Electronic Systems, 2012
A distributed attitude coordination control scheme using terminal sliding mode (TSM) is proposed for a group of spacecraft in the presence of external disturbances. A novel fast terminal sliding manifold is presented, and a robust control term based on the hyperbolic tangent function is employed to suppress bounded external disturbances.
An-Min Zou, Krishna Dev Kumar
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Pulse-based periodic control for spacecraft formation flying

Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000
Distributed spacecraft formation flying has been identified as an enabling technology by NASA and the US Air Force for several future space missions. Implementation of the distributed spacecraft formation flying concept requires tight, autonomous, cooperative, real-time control of the relative distance and attitude between the participating spacecraft.
Q. Yan, V. Kapila, A.G. Sparks
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Spacecraft Formation Flying Control Using Mean Orbit Elements

The Journal of the Astronautical Sciences, 2000
Two nonlinear feedback control laws are presented for reestablishing a desired J2 invariant relative orbit. Since it is convenient to describe the relative orbit of a deputy with respect to a chief satellite in terms of mean orbit element differences, and because the conditions for a relative orbit being J2 invariant are expressed in terms of mean ...
Hanspeter Schaub, Srinivas R. Vadali, John L. Junkins, Kyle T. Alfriend   +3 more
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