MATEC Web Conf.
Volume 83, 2016CSNDD 2016 - International Conference on Structural Nonlinear Dynamics and Diagnosis
|Number of page(s)||4|
|Section||Deterministic and stochastic dynamics and control of nonlinear systems|
|Published online||16 November 2016|
Dynamics of structures of clusters of tethered satellite
1 Federal University of ABC, Aerospace Department, 5001 Avenida dos Estados Unidos, Santo André, SP, Brazil
2 Aeronautical Institute of Technology, Aeronautical Mechanics Department, S. Jose dos Campos, SP, Brazil
3 Polytechnic School of University of São Paulo, Structural Engineering Department, São Paulo, SP, Brazil
4 Federal University of ABC, Aerospace Department, 3 Arcturus, São Bernardo do Campo, SP, Brazil
In this paper, we study the nonlinear dynamics of clusters of tethered satellites via numerical step-by-step time integration of the differential equations of motion. The basic algorithm is Central Difference explicit method. The masses of the space vehicles are considered lumped and the connection cables are considered massless and of linear elastic material. The considered nonlinearities are due to large displacements leading to changes in masses coordinates. The proposed algorithm does not involve assemblage of stiffness matrices. Instead, the elastic restoring forces are directly computed at each time step. A new time step optimization procedure is implemented. As an example, a cluster of four satellites in a tetrahedral disposition is considered. Free damped vibrations due to large initial conditions are computed.
© The Authors, published by EDP Sciences, 2016
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