Dynamics of Space Deployable Structures

2015 ◽  
Author(s):  
Qiang Tian ◽  
Jiang Zhao ◽  
Cheng Liu ◽  
Chunyan Zhou ◽  
Haiyan Hu
Keyword(s):  
Equations Of Motion ◽  
Scientific Basis ◽  
Advanced Technology ◽  
Space Structures ◽  
Deployable Structures ◽  
Large Space ◽  
Modeling Analysis ◽  
High Efficient ◽  
Space Deployable Structures ◽  
And Control

The space industry is eager to have the advanced technology of large space structures composed of trusses, cables and meshes. These space structures will deploy on orbit for different space missions. The important scientific basis of the technology is the nonlinear dynamic modeling, analysis and control of those space structures during their deployment and service. In this study, many space deployable structures (such as satellites antenna and spinning solar sail) are described by using the absolute nodal coordinate formulation (ANCF), and the huge set of equations of motion are solve by high efficient parallel generalized-alpha method. Some numerical results are also validated by experiment results.

Static Shape Determination and Control of Large Space Structures: II. A Large Space Antenna

1984 ◽  
Vol 106 (4) ◽  
pp. 267-272 ◽  
Author(s):  
Connie J. Weeks
Keyword(s):  
Adjoint System ◽  
Performance Criteria ◽  
Space Structures ◽  
Space Antenna ◽  
Large Space ◽  
Solution Algorithms ◽  
Large Space Structures ◽  
Shape Determination ◽  
Control Forces ◽  
And Control

An integral operator approach is used to derive solutions to static shape determination and control problems associated with large space structures. Problem assumptions include a linear self-adjoint system model, observations and control forces at discrete points, and quadratic performance criteria for the comparison of estimates or control forces. Solutions reduce to the solution of linear equations of dimension on the order of the numbers of observations or control forces. Results are illustrated by simulations with a finite element model of a large space antenna. Modal expansions for terms in the solution algorithms are presented, using modes from the static or associated dynamic model. These expansions provide approximate solutions in the event that a closed form analytical solution to the system boundary value problem is not available.

Dynamics and control of large space structures

1984 ◽  
Vol 7 (5) ◽  
pp. 514-526 ◽  
Author(s):  
G. S. Nurre ◽  
R. S. Ryan ◽  
H. N. Scofield ◽  
J. L. Sims
Keyword(s):  
Space Structures ◽  
Large Space ◽  
Large Space Structures ◽  
Dynamics And Control ◽  
And Control

Dynamic Response Analysis of Large Latticed Space Structures

1989 ◽  
Vol 4 (1) ◽  
pp. 25-42 ◽  
Author(s):  
A.R. Kukreti ◽  
N.D. Uchil
Keyword(s):  
Dynamic Response ◽  
Degrees Of Freedom ◽  
Equations Of Motion ◽  
Computational Time ◽  
Space Structures ◽  
Response Analysis ◽  
Actual System ◽  
Large Space ◽  
Element Analysis ◽  
Dynamic Response Analysis

In this paper an alternative method for dynamic response analysis of large space structures is presented, for which conventional finite element analysis would require excessive computer storage and computational time. Latticed structures in which the height is very small in comparison to its overall length and width are considered. The method is based on the assumption that the structure can be embedded in its continuum, in which any fiber can translate and rotate without deforming. An appropriate kinematically admissable series function is constructed to descrbe the deformation of the middle plane of this continuum. The unknown coefficients in this function are called the degree-of-freedom of the continuum, which is given the name “super element.” Transformation matrices are developed to express the equations of motion of the actual systems in terms of the degrees-of-freedom of the super element. Thus, by changing the number of terms in the assumed function, the degrees-of-freedom of the super element can be increased or decreased. The super element response results are transformed back to obtain the desired response results of the actual system. The method is demonstrated for a structure woven in the shape of an Archimedian spiral.

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