Multiobjective Shape Optimization for Deployment and Adjustment Properties of Cable-Net of Deployable Antenna

You, Guoqiang; Pei, Yang

doi:10.1155/2015/384659

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…In consonance with shifts within the physical entities, the digital twin models also evolve, fostering a two-way exchange of information and iterative refinement. This real-time attribute is referred to as the spatiotemporal essence of digital twins [22]. Elaborate spatiotemporal representation is elucidated in Table 1.…”

Section: Cable Force Variation Displacement Change Overall Deformatio...mentioning

confidence: 99%

Methods and Applications of Safety Control for Cable Net Structure Considering Spatiotemporal Changes

Wang,

Zhang,

Liu

et al. 2023

Sustainability

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The construction of cable net structures is intricate, and the construction process itself is laborious. Conventional safety control measures during the construction of cable net structures involve monitoring cable forces and deformations at specific moments during the construction steps. However, these measures do not guarantee adequate safety assurance. This paper proposes a method for the safety control of cable net structures, considering spatiotemporal changes, based on the concept of digital twins. This method enables real-time monitoring and control of the cable net construction process onsite, facilitating a comparative analysis between the mechanical and geometric information of the construction site and the real-time finite element simulation results. Such an approach ensures safety control throughout the construction process. Firstly, a twin model framework for safety control is established. Then, the methods for spatiotemporal representation, data collection, and processing at the construction site are analyzed. Finally, the proposed method is validated through its application to the Xiaotian Cultural and Sports Park project. The results demonstrate that this method can achieve real-time monitoring and control of cable net structure construction.

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Section: Cable Force Variation Displacement Change Overall Deformatio...mentioning

confidence: 99%

Methods and Applications of Safety Control for Cable Net Structure Considering Spatiotemporal Changes

Wang,

Zhang,

Liu

et al. 2023

Sustainability

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“…en the optimization mathematical model for grouped inner cablenet can be established with these 10 coefficients as variables. In conditions with T a ≥15 N and T a ≥30 N, the above optimization mathematical model is separately solved by using generalized reduced gradient method [14]. When upper limit of variables X U is set to 1000, lower limit of variables X L is set to −1000 and variables' initial values are all set to 100; the optimal inner cablenets' pretension distribution obtained is shown in Figure 9.…”

Section: An Examplementioning

confidence: 99%

A Structural Analysis Method for Cable-Beam Composite Structure

You¹

2020

Mathematical Problems in Engineering

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A structural analysis method is proposed in this paper for cable-beam composite structure with a large number of cable elements; it can improve computational efficiency and accuracy. Firstly, we use a structural division method to divide the whole cable-beam structure into inner cablenet system and edge cablenet-beam system. Because inner cablenet is a pure cablenet structure with given shape and topology, balance matrix analysis method is used to help obtain the best pretension distribution of it with the evenness as objective. For edge cablenet-beam system, with obtaining equilibrium forces of inner cablenet’s pretensions as goal, an iterative pretension losses compensation calculation combined with nonlinear finite element method and balance matrix analysis method is used for edge cablenet to adjust its pretension distribution and make the whole cablenet system keep its preset ideal shape under influence of beams’ deformations. Because edge cablenet-beam system has a lot less cable elements than overall structure, its nonlinear finite element calculations are much easier and faster than those for the whole cable-beam composite structure. In order to verify the above method’s validity, it is used for a spaceborne cablenet deployable antenna example, and the computed results indicate that the method is feasible.

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“…And the deployment accuracy is the key to ensure the normal operation [1][2][3][4]. Common deployable mechanisms are constructed with hinged bars as well as with the tightrope connected for enhancing stability [5][6][7][8]. In practice, the joint clearance is inevitable due to manufacture errors and the need for superior rotation capability.…”

Section: Introductionmentioning

confidence: 99%

Deployment accuracy analysis of cable-strut deployable mechanism with joint clearances and forces constrained

Lin¹,

Chen²,

Chen³

et al. 2018

J. vibroeng.

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The effects on deployment accuracy of joint clearances and forces acting on the deployable mechanism are investigated. "A virtual massless link" is used to describe the joint clearance of the mechanism in the free state. Aiming at the following problems of multi-loop linkages mechanical system such as loop constraints coupling and complicated topology structure, the geometric relationships and the deploying error equations of deployable mechanism are provided based on Denavit-Hartenberg matrix by splitting multi-loop linkage into 3 single-loop linkages. In addition, with consideration of forces, "a virtual massless rope" is used instead of "virtual massless link" to describe the joint clearance for avoiding the extra singularities. And the criterion of mechanism in stable configuration is obtained by weighting coefficient method on the basis of minimum potential principle. The solving procedure of deploying error equations in the state of forces constrained is presented by combining Monte-Carlo method with genetic algorithm, it is an effective solution for the nonlinear objective function with multiple constraints and strong coupling. The results indicate that the appropriate forces acting on mechanism produce a significant effect on improving repeat accuracy, and the absolute accuracy can be improved with the future error compensation.

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Multiobjective Shape Optimization for Deployment and Adjustment Properties of Cable-Net of Deployable Antenna

Cited by 5 publications

References 16 publications

Methods and Applications of Safety Control for Cable Net Structure Considering Spatiotemporal Changes

Methods and Applications of Safety Control for Cable Net Structure Considering Spatiotemporal Changes

A Structural Analysis Method for Cable-Beam Composite Structure

Deployment accuracy analysis of cable-strut deployable mechanism with joint clearances and forces constrained

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