Modeling and Simulation Challenges for Softgoods in Space Deployable Structures

2019 ◽  
Author(s):  
Velibor Cormarkovic ◽  
Lee D. Peterson ◽  
Mehran Mobrem
Keyword(s):  
Modeling And Simulation ◽  
Deployable Structures ◽  
Space Deployable Structures

Research on Minimum Pressure Angle of Bennett Linkage

2019 ◽  
Author(s):  
Lele Bai ◽  
Lubin Hang ◽  
Xiaobo Huang ◽  
Mingyuan Wang ◽  
Ziyu Liu
Keyword(s):  
Twist Angle ◽  
Kinematic Model ◽  
Analytic Formula ◽  
Geometric Meaning ◽  
Output Link ◽  
Deployable Structures ◽  
Minimum Pressure ◽  
Pressure Angle ◽  
Important Index ◽  
Space Deployable Structures

Abstract Space deployable structures that are constructed by the single loop over-constrained linkages have been extensively applied in the fields of aerospace and construction. The pressure angle regarded as an important index to measure the performance of the basic units has attracted more and more attention. The kinematic model of the Bennett linkage is studied by the D-H matrix and the analytic formula of the pressure angle has been deducted through kinematic equations. The rule of the Bennett linkage has been discovered that the minimum pressure angle occurs while the input angle equals nπ + π / 2(n ∈ N). According to the linkage configuration at the input angle of π / 2, the geometric meaning is revealed that the minimum pressure angle of the linkage is the same as the twist angle of the joint axes of the output link. Finally, conclusions can also be drawn that the smaller the twist angle of the output link is, the smaller the minimum pressure angle will be. The research enriches the kinematics of Bennett linkage and provides a reference for its engineering applications.

scholarly journals Local deformation method for measuring element tension in space deployable structures

2017 ◽  
Vol 102 ◽  
pp. 01007 ◽  
Author(s):  
Sergey Belov ◽  
Mikhail Pavlov ◽  
Viktor Ponomarev ◽  
Sergey Ponomarev
Keyword(s):  
Local Deformation ◽  
Deformation Method ◽  
Deployable Structures ◽  
Measuring Element ◽  
Space Deployable Structures

scholarly journals Design and experiment of a passive damping device for the multi-panel solar array

2017 ◽  
Vol 9 (2) ◽  
pp. 168781401668796 ◽  
Author(s):  
Yongfang Kong ◽  
Hai Huang
Keyword(s):  
Technology Development ◽  
Test Sample ◽  
Solar Array ◽  
Response Analysis ◽  
Finite Element Models ◽  
Space Technology ◽  
Structural Damping ◽  
Deployable Structures ◽  
Space Deployable Structures ◽  
Design Guidance

With the space technology development, large flexible space deployable structures have been used widely. Studying on the vibration control for large flexible space deployable structures becomes very important. In this study, a novel passive vibration damping device is developed for the multi-panel sun-orientated deployable solar array. Its upper strut contains a viscous damper while the lower strut is rigid. The device is lockable and located near the solar array root hinge to increase the structural damping without reducing the fundamental frequency. This design will not influence the original functions of the solar array, such as folding, deploying, and sun tracking. The corresponding finite element models are established, and the properties of the damping device are investigated by modal analysis and transient response analysis. The damping mechanism design for a certain type of solar array is presented. The associated modal tests based on a solar array test sample verify the effectiveness of the device. Conclusions are drawn to help define design guidance for future damping device implementations.

Active Moving Polymers and Multifunctional Composites: Shape the Future Structures

2013 ◽  
Vol 745 ◽  
pp. 129-134 ◽  
Author(s):  
Jin Song Leng
Keyword(s):  
Smart Materials ◽  
Biomedical Engineering ◽  
Composite Structures ◽  
Shape Memory Polymer ◽  
Multifunctional Composites ◽  
Deployable Structures ◽  
Wide Range ◽  
Space Deployable Structures ◽  
Short Carbon

Smart materials can be defined as the materials that have the capability of sensing and reacting to environmental conditions or stimuli. In recent years, a wide range of novel smart materials have been developed, the applications of which now cover various important fields including aerospace, automobile, telecommunications, and so forth. This talk mainly focuses on recent progresses of Active Moving Polymer (i.e. Shape Memory Polymer, SMP), and SMP based composite structures, as well as their applications including aerospace, astronautics and biomedical engineering. This presented work summarizes the recent advances in novel SMP including epoxy-based SMP, styrene-based SMP, cyanate ester-based SMP, polyurethane-based SMP, multiple SMP, design and characterization of SMP composites (SMPCs) filled with nickel chains, short carbon fiber, carbon nanotube chains, carbon nanopaper, and so on. The SMP stimulus methods, including heat, electric, light, magnetic field, and solvent have been introduced. The application of SMPCs used in aircraft morphing and space deployable structures is also investigated.

Approximation of Cylindrical Surfaces With Deployable Bennett Networks

2016 ◽  
Author(s):  
Shengnan Lu ◽  
Dimiter Zlatanov ◽  
Xilun Ding
Keyword(s):  
Modeling And Simulation ◽  
Case Studies ◽  
Cylindrical Surface ◽  
Kinematic Analysis ◽  
Geometric Parameters ◽  
Degree Of Freedom ◽  
Curved Surfaces ◽  
Deployable Structures ◽  
Elliptical Cylinders ◽  
Insight Into

This paper presents a one-degree-of-freedom network of Bennett linkages which can be deployed to approximate a cylindrical surface. The geometry of the unit mechanism is parameterized and its position kinematics is solved. The influence of the geometric parameters on the deployed shape is examined. Further kinematic analysis isolates those Bennett geometries for which a cylindrical network can be constructed. The procedure for connecting the unit mechanisms in a deployable cylinder is described in detail and used to gain insight into, and formulate some general guidelines for, the design of linkage networks which unfold as curved surfaces. Case studies of deployable structures in the shape of circular and elliptical cylinders are presented. Modeling and simulation validate the proposed approach.

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