AbstractA practical design criterion that allows the coilable mast bottom to deploy in local coil mode was proposed. The criterion was defined with initial bottom helical angle and obtained by bottom deformation analyses. Discretizing the longerons into short rods, analyses were conducted based on the cylinder assumption and Kirchhoff's kinetic analogy theory. Then, iterative calculations aiming at the bottom four rods were carried out. A critical bottom helical angle was obtained while the angle changing rate equaled to zero. The critical value was defined as a criterion for judgement of bottom deployment mode. Subsequently, micro-gravity deployment tests were carried out and bottom deployment simulations based on finite element method were developed. Through comparisons of bottom helical angles in critical state, the proposed criterion was evaluated and modified, that is, an initial bottom helical angle less than critical value with a design margin of −13.7% could ensure the mast bottom deploying in local coil mode, and further determine a successful local coil deployment of entire coilable mast.
HighlightsA design criterion to achieve coilable mast bottom local-coil deployment is proposed.The criterion validity is evaluated by the deployment experiments and simulations.Discretization and integrals contribute to the longeron deformation analysis.A smaller initial bottom helical angle is preferable in actual coilable mast design.
Study on the criterion to determine the bottom deployment modes of a coilable mast
Acta Astronautica ; 141 ; 89-97
2017-09-25
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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