A Study of a Mobile Launch Platform Effect on Bi-folded Wing Deployment

Lee, Younghwan; Lee, Jae Eun; Kim, Min; Jung, Suk Young

doi:10.1007/s42405-021-00375-x

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…In the case of SAR antennas, to maximize resolution and power gain in acquiring high-resolution images, a large deployable panel is accommodated. However, to deploy such a large space deployment structure in orbit, it is essential to use specific mechanisms that allow the structure to be appropriately folded and stored inside the launch-vehicle fairing and fully deployed in orbit [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Validation of a Passive Truss-Link Mechanism for Deployable Structures Considering Friction Compensation with Response Surface Methods

et al. 2022

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In this study, a passive truss-link mechanism applicable to large-scale deployable structures was designed to achieve successful deployment in space. First, we simplified the selected truss-link mechanisms to the two-dimensional geometry and calculated the degrees of freedom (DOF) to determine whether a kinematic over-constraint occurs. The dimensions of the truss-link structure were determined through a deployment kinematic analysis. Second, a deployment simulation with the truss-link was conducted using multibody dynamics (MBD) software. Finally, a deployment test was performed considering gravity compensation, and the results were compared with those of MBD simulation. The results of the deployment simulations were confirmed to be slightly faster than those of the deployment test due to friction effects existing in the joints and gravity compensation devices. To address this issue, inverse identification of the equivalent frictional torque (EFT) at the revolute joints in the deployment test was conducted through response surface methods (RSM) combined with the central composite design technique. As a result, we confirmed that the deployment angle history of the deployment simulation was similar to that of the deployment test.

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Section: Introductionmentioning

confidence: 99%

Modeling and Validation of a Passive Truss-Link Mechanism for Deployable Structures Considering Friction Compensation with Response Surface Methods

et al. 2022

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Force/Moment-Conserving Pressure Mapping Scheme for Fluid/Structure Interaction Analysis

2023

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With the developments in computer-aided engineering, more complex and difficult simulations have become possible, and the demand for fluid/structure interaction (FSI) analysis has been increasing. Various approximation methods have been developed for pressure/load data mapping for FSI analysis. However, for most existing mapping algorithms, the sum of force/moment, which is one of the most important physical properties to be conserved, is not generally conserved. In this paper, we propose a new pressure mapping technique that is intuitive and easy to implement while algorithmically preserving force/moment for interfaces with complex and simple shapes. This technique distributes the pressure of the computational fluid dynamics (CFD) boundary mesh as concentrated loads to the nodes of the nearest structural element. The load distribution from each CFD cell is assumed to satisfy a plane equation, and the mapping loads are obtained by solving the equations to determine the coefficients of the plane equation. Furthermore, an algorithm to search for neighboring structural nodes for load mapping has been developed for various situations. To verify the proposed method, a simple plate model, pipe model with internal flow, and full-scale aircraft model were used. The results of the validation examples showed reliable load distributions and structural deformations with force/moment conservation.

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A Study of a Mobile Launch Platform Effect on Bi-folded Wing Deployment

Cited by 2 publications

References 3 publications

Modeling and Validation of a Passive Truss-Link Mechanism for Deployable Structures Considering Friction Compensation with Response Surface Methods

Modeling and Validation of a Passive Truss-Link Mechanism for Deployable Structures Considering Friction Compensation with Response Surface Methods

Force/Moment-Conserving Pressure Mapping Scheme for Fluid/Structure Interaction Analysis

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