Results 191 to 200 of about 2,030 (237)

Extension of tethered satellites in the atmosphere

Acta Astronautica, 2003
An important application of tethered satellites isatmospheric studies by extension of a subsatellite into the atmosphere through tether while the parent spacecraft *ies at an altitude high enough so that the deleterious e+ects of the atmosphere on it are inconsequential. The key issue in the operation is the swift extension of the tether.
Pradeep, S, Kumar, K
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Constrained Motion of Tethered Satellites

Volume 6: 5th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A, B, and C, 2005
The orbital motion of tethered satellites is a highly complex nonlinear problem. This investigation sets out to formulate a new method that significantly simplifies the dynamic analysis of tethered satellite systems. This is accomplished using the fundamental equation for constrained dynamic systems, which was formulated by Udwadia and Kalaba.
Aaron D. Schutte, Brian A. Dooley
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Detection of Tethered Satellite Systems

The Journal of the Astronautical Sciences, 2004
The detection and identification of tethered satellite systems is a problem of current interest. Most previous studies focused on the detection and identification of one tethered satellite system using the observations of one satellite in the system. Here, we consider the problem of determining which of two or more satellites that are observed to be in
Nammi J. Choe, John E. Cochran, Jung H. Jo   +2 more
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ATMOSPHERIC PERTURBATION AND CONTROL OF A SHUTTLE/TETHERED SATELLITE

IFAC Proceedings Volumes, 1979
A simplified model of the strong atmospheric perturbation of a small satellite attached to the orbiter by a long, straight tether predicts undesirable uncontrolled libration motions similar to those from sophisticated models. The simplified model is used to compare performance limitations of two simple control systems that rely only on tether tension ...
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Nonlinear stabilization of tethered satellites

Proceedings of the 27th IEEE Conference on Decision and Control, 2003
A set of dynamic equations governing the dynamics of a tethered satellite system and stabilizing tension control laws in feedback form are derived. The tether is assumed rigid and massless, and the equations of motion are derived using the system Lagrangian.
D.-C. Liaw, E.H. Abed
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Tension sensor for tethered satellites

[1989] Proceedings. The Twenty-First Southeastern Symposium on System Theory, 2003
The design, construction, and testing of a tension sensor for sensing tension in a flexible tether connecting two orbiting satellites are presented. The analog sensor measures the tension profiles for deployment, retrieval, and disturbances of the tethered satellite system.
M. Greene, D. Kromann
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Dynamics of variable-length tethers with application to tethered satellite deployment

Communications in Nonlinear Science and Numerical Simulation, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tang, Jiali, Ren, G. X., Zhu, W. D., Ren, Hui   +3 more
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Tethered Satellites in the geophysical environment

Il Nuovo Cimento C, 1993
A short presentation is given of the basic physical principle of a Tethered-Satellite System. The motion equations are summarized. A variety of physical phenomena in the upper atmosphere and ionosphere, as well as related to geomagnetism and gravity field will benefit by such type of missions; they are briefly illustrated and discussed.
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Various Methods of Controlling the Deployment of a Tethered Satellite

Journal of Vibration and Control, 2003
The deployment of a subsatellite from a mother spaceship moving on a circular orbit is a delicate operation for a tethered satellite system because this process leads to an unstable motion with respect to the stable radial relative equilibrium of such a system if the tether length is kept constant.
Barkow, B., Steindl, A., Troger, H., Wiedermann, G.   +3 more
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Deployment and Retrieval of Shuttle Supported Tethered Satellites

Journal of Guidance, Control, and Dynamics, 1982
Summary: The general dynamical model is used to investigate the deployment and retrieval dynamics and control of the tether connected shuttle/subsatellite system. Control of the in-plane motion is provided by letting the difference between the rate of change of the undeformed length of the tether and a commanded length rate vary linearly with the state
Misra, A. K., Modi, V. J.
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