Abstract
This paper is mainly concerned with the coupling dynamic analysis of a complex spacecraft consisting of one main rigid platform, multiple liquid-filled cylindrical tanks, and a number of flexible appendages. Firstly, the carrier potential function equations of liquid in the tanks are deduced according to the wall boundary conditions. Through employing the Fourier–Bessel series expansion method, the dynamic boundaries conditions on a curved free-surface under a low-gravity environment are transformed to general simple differential equations and the rigid-liquid coupled sloshing dynamic state equations of liquid in tanks are obtained. The state vectors of rigid-liquid coupled equations are composed with the modal coordinates of the relative potential function and the modal coordinates of wave height. Based on the Bernoulli–Euler beam theory and the D’Alembert’s principle, the rigid-flexible coupled dynamic state equations of flexible appendages are directly derived, and the coordinate transform matrixes of maneuvering flexible appendages are precisely computed as time-varying. Then, the coupling dynamics state equations of the overall system of the spacecraft are modularly built by means of the Lagrange’s equations in terms of quasi-coordinates. Lastly, the coupling dynamic performances of a typical complex spacecraft are studied. The availability and reliability of the presented method are also confirmed.
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The project was supported by the National Natural Science Foundation of China (Grants 11472041, 11302244, 11532002) and Guangxi Natural Science Foundation (2015GXNSFBA139013).
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Wu, WJ., Yue, BZ. & Huang, H. Coupling dynamic analysis of spacecraft with multiple cylindrical tanks and flexible appendages. Acta Mech. Sin. 32, 144–155 (2016). https://doi.org/10.1007/s10409-015-0497-3
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DOI: https://doi.org/10.1007/s10409-015-0497-3