Design and Optimization of Space Deployable Tri-prism Mast

Gao, Mingxing; Liu, Rongqiang; Li, Bingyan; Guo, Heng; Deng, Zongquan

doi:10.3901/jme.2020.15.129

Cited by 3 publications

(1 citation statement)

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“…The extension arm was also a modular unit with a triangular prism, and its main components include a longitudinal rod, a rope, a triangular frame, casing, and a super-elastic hinge. An expandable triangular prism type extension arm composed of a longitudinal rod, a beam, a tension cable, and a hinge was proposed (Gao et al, 2020). The extension arm is driven by a spring taking into account the load.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of a box-structured satellite deployment mechanism with self-actuated torsion joints

Sheng,

Ma,

2024

Mech. Sci.

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Abstract. This paper designed a kind of satellite deployment mechanism with a boxed structure and passive torsion joints. This deployment mechanism has significant strengths, including a high base frequency and stiffness, a high ratio of deployed and folded space occupation ratios, and self-actuated joints without needing any external power to drive. In order to analyze the dynamic characteristics of this mechanism, a simplified governing equation is proposed and dynamic behavior is studied systematically, including impact response, harmonic response, and modal analysis. Through systematic research, several conclusions are drawn. Firstly, when the deployment mechanism reached the ending stage of unfolding driven by passive torsional joints, the load base installed on top of the deployment mechanism generated a first-order sharp reaction force and multiple low-order shocks followed, and the system entered a stable state after a certain time of vibration. Secondly, the system can generate a high vibration magnitude at low-frequency excitation when the mechanism is in a fully deployed state and at high-frequency excitation when the mechanism is in a folded state. Thirdly, the first sixth-order natural frequency and vibration shape with different wall thicknesses are obtained by modal analysis. The result shows that only with a 2.5 mm wall thickness can the connecting rod satisfy the design requirement. Through dynamic behavior research, the structure characteristics are obtained which can be used for structure optimization and to provide an effective solution for the design of a box-structured satellite-unfolding mechanism with self-actuated torsion joints.

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Section: Introductionmentioning

confidence: 99%

Dynamic analysis of a box-structured satellite deployment mechanism with self-actuated torsion joints

Sheng,

Ma,

2024

Mech. Sci.

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Design, analysis, and ground deployment test of space deployable mast based on double-layer deployable unit

Zhou,

Han,

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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The space deployable mast has been successfully applied to space equipment such as solar sails and space telescopes. At present, the deployable units of the space deployable mast mostly adopt the configurations of deployable units of FAST (Folding Articulated Square Truss), HIMAT, and ADAM (Able Deployable Articulated Mast). The configuration of the deployable unit is relatively few. Besides, there is a lack of ground micro-gravity environment simulation test devices for space deployable masts. This paper proposes the space deployable mast based on the double-layer deployable unit. Firstly, the configuration design method of the double-layer deployable unit based on the screw theory has been carried out. Three double-layer hybrid mechanisms serving as the basic units of the deployable mast have been obtained. Then, the kinematic and dynamic models of deployment of the space deployable mast have been established. And the deployment simulation based on MATLAB and Simscape has been performed. Furthermore, modal and static simulations have been performed to obtain the fundamental frequencies and maximum deformation displacements of the deployable masts consisting of 1, 2, 4, 8, and 12 units with and without cables. Finally, the ground test device has been developed to carry out the ground deployment test of the space deployable mast in the ground micro-gravity environment. It has been found that the ground test device could achieve the micro-gravity simulation level of 90.5%.

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