CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
The analysis of the possibilities for the use of rotating Space Tether Systems (STS) is performed and it is shown that its results allow to achieve additional profits practically in all areas of their possible application. General and special cases in the dynamics of rotational motions of STS are considered and the main problems of research in their relation to problems of non-linear dynamics are determined. Perturbed motions of STS are treated by applying asymptotic methods of non-linear mechanics. A new technique of analysis of STS systems with essentially non-linear oscillatory links is developed. For the application of this technique a new scheme for the derivation of the equations of perturbed Keplerian motion is presented and the new form of the equations of perturbed orbital motion is developed.
The main laws of evolution of rotational motions of STS under the action of internal and external perturbations are considered, taking into account the influence of essentially non-linear internal oscillations on the dynamics of STS systems. Consequences of the effect of dissipative forces due to aerodynamic resistance and internal friction in the string material are investigated. Coupling of orbital and relative attitude motions is analysed and laws of control by periodic changes of the distance between the bodies in orbit are determined. A validated model problem for the research of processes of chaotization and synchronisation in the dynamics of STS is presented. Conditions of the origin and the domain of stochastic motions are determined. The evolution of phase portraits under changes of parameters is analysed.
A major part of the work is devoted to the preparation and realisation of performing experiments. Here efforts were concentrated on the development of small experimental STS, stabilisation by rotation. The analysis of both the dynamics of deployment of a subsatellite and keeping a stable configuration of the system is performed and schemes for their possible realisations are presented. Modelling of processes of ground experimental researches is carried out. Especially processes of the separation of bodies, unreeling of the string from the reel and research of mechanical properties of the string are considered. The following techniques have been developed and experimentally checked:
determination of attitude motion of a rigid body from a photographic image, construction of estimates of kinematic parameters of motion of separated STS bodies, selection of the string (tether) and investigation of its mechanical properties, determination of forces of resistance in unreeling the string from the reel for the deployment of STS.
The developed schemes, the calculated solutions and the results of the experimental research would allow to design a prototype of a small STS to be launched in orbit.
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