Nonlinear dynamics of flexible tethered satellite system subject to space environment |
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Authors: | Bensong Yu Dongping Jin Hao Wen |
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Institution: | State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract: | The paper studies the nonlinear dynamics of a flexible tethered satellite system subject to space environments, such as the J 2 perturbation, the air drag force, the solar pressure, the heating effect, and the orbital eccentricity. The flexible tether is modeled as a series of lumped masses and viscoelastic dampers so that a finite multidegree-of-freedom nonlinear system is obtained. The stability of equilibrium positions of the nonlinear system is then analyzed via a simplified two-degree-freedom model in an orbital reference frame. In-plane motions of the tethered satellite system are studied numerically, taking the space environments into account. A large number of numerical simulations show that the flexible tethered satellite system displays nonlinear dynamic characteristics, such as bifurcations, quasi-periodic oscillations, and chaotic motions. |
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Keywords: | flexible tether model stability tethered satellite system nonlinear dynamics space environment |
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