Results 251 to 260 of about 51,915 (304)
Some of the next articles are maybe not open access.
Ultra-Dense LEO Satellite Based Formation Flying
IEEE Transactions on Communications, 2021In this article, we consider a downlink ultra-dense LEO-based multi-terminal satellite system where multiple satellites fly in formation to serve a number of ground terminal stations for data transmission. Benefited from the dense satellite constellation, high channel capacity can be achieved via the massive virtual antenna array formed by multiple ...
Ruoqi Deng, Boya Di, Lingyang Song
openaire +1 more source
μ Control for Satellites Formation Flying
Journal of Aerospace Engineering, 2007In this paper, a μ controller is designed for a satellite formation flying system around the Earth based on an uncertainty model derived from a nonlinear relative position equation. In this model, nonzero eccentricity and varying semimajor axis are included as parametric uncertainties.
Yunjun Xu +3 more
openaire +1 more source
An intelligent control concept for formation flying satellites
International Journal of Robust and Nonlinear Control, 2002AbstractThis paper deals with the determination of initial conditions and the design of fuel‐balancing orbit control laws for a formation of satellites. Hill's equations describe the linearized dynamics of relative motion between two satellites. They admit bounded relative orbit solutions as special cases.
Vadali, S. R. +2 more
openaire +2 more sources
Adaptive nonlinear control of satellite formation flying
Guidance, Navigation, and Control Conference and Exhibit, 1999This paper considers the problem of relative position control for multiple satellite for- mation flying (MSFF). Specifically, the full nonlin- ear dynamics describing the relative positioning of MSFF are used to develop a Lyapunov-based, non- linear adaptive control law that guarantees global asymptotic convergence of the position tracking er- ror in ...
M. de Queiroz, V. Kapila, Q. Yan
openaire +1 more source
Agent Based Controller for Satellite Formation Flying
2005 International Conference on Intelligent Sensors, Sensor Networks and Information Processing, 2005In this paper an agent based control scheme for satellite formation flying is discussed. The underlying idea of our design is to use a multi-agent architecture for satellite formation flying control. The architecture is designed to enable autonomous formation flying activities. The performance requirements and algorithms are described.
K.K.T. Thanapalan, S.M. Veres
openaire +1 more source
FormSat, a scalable formation flying communication satellite system
2010 IEEE Aerospace Conference, 2010The competitive and evolving nature of the commercial communications satellite market sector, combined with the limited number of allocations in geosynchronous orbit, have led to a steady increase in the complexity, size and weight of satellites. Satellite manufacturers in the sector have suffered from increased non-recurring engineering costs and low ...
Braukhane, A. +7 more
openaire +2 more sources
Robust Trajectory Tracking in Satellite Time-Varying Formation Flying
IEEE Transactions on Cybernetics, 2021The robust time-varying formation control problem for a group of satellites is addressed. By the static state feedback control strategy and the disturbance estimation theory, a formation flying controller is proposed for the satellite group to form desired time-varying formation patterns and trajectories, and achieve the satellite attitude consensus ...
Hao Liu, Yu Tian, Frank L. Lewis
openaire +2 more sources
Satellite formation flying using along-track thrust
Acta Astronautica, 2007Abstract The formation flying of satellites using thrust in along-track direction is explored in the present paper. The system comprising of a leader and a follower satellite is considered and a linear controller is developed to achieve a desired formation.
Kumar, KD +2 more
openaire +2 more sources
On the formation flying of satellite constellations
Chinese Astronomy and Astrophysics, 2004Abstract From the viewpoint of orbit dynamics, the formation flying of the satellites of a constellation and the accompanying flying in satellite-satellite tracking are affected by the following dynamical mechanisms: (1) The main characteristics of the variations of disturbed orbits determine the space configuration of the satellites.
Lin Liu, Hai-hong Wang, Jian-bo Ma
openaire +1 more source
Satellite affine formation flying with obstacle avoidance
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2019This paper studies the affine formation control problem for a group of flying satellites with the performance of obstacle avoidance. Assuming that leader satellites can detect the locations of obstacles, we first investigate how to plan advisable trajectories for leader satellites such that they can smoothly pass through some specific types of ...
Liangming Chen +4 more
openaire +1 more source