Motion Analysis of Spatial Deployable Mechanism Driven in Straight Line

Boyan, Chang; Shuai, Yang; Jin, Guoguang; Zhang, Zhuan; Zhu, Yongjie

doi:10.3901/jme.2020.05.192

Cited by 3 publications

(1 citation statement)

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“…The deployable mechanisms include the following types: the linear deployable mechanisms, planar deployable mechanisms, and space deployable mechanisms. 1 In recent years, with the continuous development of various technologies in the aerospace field, the research on the dynamics of space deployable mechanism has become a hot topic in the academic circle. 2 The space deployable mechanism is the main component of the solid surface developable antenna, and most precast units in the mechanism consist of connecting rod and joints.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis and wear calculation of space deployable mechanism considering spherical joints with clearance and coating

Jing

Liu

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the space deployable mechanism considering spherical joints with clearance, the kinematic stability and working life of will be seriously affected. To address this problem, this paper proposes a nonlinear stiffness coefficient expression and an improved viscous damping coefficient expression considering the wear reduction properties of coatings, so as to obtain a conformal contact force model based on the analysis and comparison of the existing common normal contact force models. The new contact force model is qualitatively analyzed from three aspects, namely clearance size, recovery coefficient, and material properties, so as to demonstrate the correctness and applicability of the model. In the prefabricated space deployable mechanism (RSSP) with spherical joint clearance, the acceleration variation of the actuator is analyzed and compared by using the new contact force model, and the wear quantity of the spherical joints with clearance and coating is predicted. The dynamic results show that spherical joints with clearance have a significant effect on the acceleration of the actuator, and the long working time will inevitably lead to increased vibration and reduce the motion accuracy and life of the mechanism. By comparing with the calculation results of wear, it is found that the wear of spherical joint clearance with coating decreases significantly in all vector directions, and the wear area of the Euler Angle increases slightly compared with that without coating because of the increase of contact collision frequency. Therefore, the wear calculation method and coating strategy proposed in our work can provide a theoretical basis for improving the kinematic accuracy and working life of space deployable mechanism system considering spherical joints with clearance.

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Section: Introductionmentioning

confidence: 99%

Dynamic analysis and wear calculation of space deployable mechanism considering spherical joints with clearance and coating

Jing

Liu

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Analysis of Structure and Movement Characteristics of a Pipeline Parallel Mechanism

Zhang

Ding

Zhu

et al. 2023

Iran J Sci Technol Trans Mech Eng

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Design and dynamic analysis of supporting mechanism for large scale space deployable membrane sunshield

Chang,

Guan,

Liang

et al. 2024

Aeronaut. j.

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Stray light from the sun is one of the most significant factors affecting image quality for the optical system of a spacecraft. This paper proposes a method to design a deployable supporting mechanism for the sunshield based on origami. Firstly, a new type of space mechanism with single-closed loop was proposed according to thick-panel origami, and its mobility was analysed by using the screw theory. In order to design a deployable structure with high controllability, the tetrahedral constraint was introduced to reduce the degree of freedom (DOF), and a corresponding deployable unit named tetrahedral deployable unit (TDU) was obtained. Secondly, the process to constructing a large space deployable mechanism with infinite number of units was explained based on the characteristics of motion and planar mosaic array, and kinematics analysis and folding ratio of supporting mechanism were conducted. A physical prototype was constructed to demonstrate the mobility and deployment of the supporting mechanism. Finally, based on the Lagrange method, a dynamic model of supporting mechanism was established, and the influence of the torsion spring parameters on the deployment process was analysed.

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Motion Analysis of Spatial Deployable Mechanism Driven in Straight Line

Cited by 3 publications

References 0 publications

Dynamic analysis and wear calculation of space deployable mechanism considering spherical joints with clearance and coating

Dynamic analysis and wear calculation of space deployable mechanism considering spherical joints with clearance and coating

Analysis of Structure and Movement Characteristics of a Pipeline Parallel Mechanism

Design and dynamic analysis of supporting mechanism for large scale space deployable membrane sunshield

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