Modular Line-Focused Space Solar Power Satellite

The Space Solar Power Satellite is an ultra-large space structure, which collects sunlight directly in space and then transmits it into the ground. Since the idea was invented in 1968, scientists around the world have proposed several typical conceptual design models. Nevertheless, the conceptual models have not been implemented for technological, manufacturing, and cost reasons. This paper presents a novel Space Solar Power Satellite scheme with modular line-focused concentrators and low concentration photovoltaic modules. First, the line-focused mode is analyzed and the optical performance of the circular trough concentrator is evaluated via ray-trace technique. Then, shape optimization for the cell array based on the Bézier curve is carried out to improve the optical property. Numerical examples indicate that the optimized cell array could obtain high power collection efficiency and suitable energy distribution. Moreover, the area of the photovoltaic cell array is reduced, which is conducive to cost reduction. Furthermore, modular design is conducted on the circular trough concentrator. Finally, the primary scheme of the novel Space Solar Power Satellite is designed with the previous modular concentrator and optimized cell array.

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Control of dynamic response of a continuum model of a large space structure

10.2514/6.1985-591 ◽

1985 ◽

Author(s):

S. ATLURI

Keyword(s):

Dynamic Response ◽

Continuum Model ◽

Space Structure ◽

Large Space ◽

Large Space Structure

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Integrated Controls-Structures Optimization of a Large Space Structure

10.2514/6.1990-1058 ◽

1990 ◽

Cited By ~ 7

Author(s):

SHARON PADULA ◽

JOANNE WALSH ◽

CHRIS SANDRIDGE ◽

RAPHAEL HAFTKA

Keyword(s):

Space Structure ◽

Large Space ◽

Large Space Structure

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An algebraic approach based on symmetry relations of state space matrices for decoupling the dynamics of a large space structure

Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301) ◽

10.1109/acc.2002.1023206 ◽

2002 ◽

Author(s):

M. Sigut ◽

L. Acosta ◽

F. Martin ◽

L. Moreno ◽

A. Hamilton

Keyword(s):

State Space ◽

Algebraic Approach ◽

Space Structure ◽

Large Space ◽

Large Space Structure ◽

Symmetry Relations

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Empirical Formula Considering the Smoke Ventilation for Air Temperature in Large Space Structure under Fire

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.94-96.587 ◽

2011 ◽

Vol 94-96 ◽

pp. 587-593 ◽

Cited By ~ 2

Author(s):

Jin Liang ◽

Su Duo Xue ◽

Xiong Yan Li

Keyword(s):

Air Temperature ◽

Empirical Formula ◽

Steel Structures ◽

Space Structure ◽

Space Structures ◽

Large Space ◽

Fire Temperature ◽

Large Space Structure ◽

Fire Smoke ◽

Resistance Performance

Abstract.The fire smoke is one of the most important factors for the fire temperature field. Once the fire smoke has been exhausted effectively, the fire temperature will be reduced and the fire-resistance performance of steel structures may be improved as well. However, the research on the fire temperature in the space structures is almost bold, which could lead to the theoretical analysis result on fire temperature is quite different from the real condition. Accordingly, the air temperature condition on fire for large-space structures has been analyzed. Taken into account smoke ventilation, the empirical formula for air temperature in large space structure under fire has been modified.

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Membrane Modular Structures With Inflatable Tubes and Connective Cables for Future Space Applications

Volume 2: Multifunctional Materials; Enabling Technologies and Integrated System Design; Structural Health Monitoring/NDE; Bio-Inspired Smart Materials and Structures ◽

10.1115/smasis2009-1480 ◽

2009 ◽

Author(s):

Nobuhisa Katsumata ◽

Ryoko Fujii ◽

M. C. Natori ◽

Hiroshi Yamakawa

Keyword(s):

Conceptual Models ◽

Space Structure ◽

Modular Structure ◽

Membrane Structures ◽

Large Space ◽

Space Applications ◽

Cable Networks ◽

Large Space Structure ◽

Future Space ◽

Modular Structures

Spirally folded hexagonal membrane structures with inflatable tubes and connective cable networks are presented aiming to establish possible construction scenarios of future large space structure systems over hundreds meters scale and corresponding structures based on the hierarchical modular structure concept using deployable membrane modules. Laboratory scale hand-made conceptual models are manufactured, and their deployment experiments are carried out to show their applicability to the hierarchical modular structures systems.

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Mathematical modeling of transformable space structure dynamics

EPJ Web of Conferences ◽

10.1051/epjconf/201922101018 ◽

2019 ◽

Vol 221 ◽

pp. 01018 ◽

Cited By ~ 1

Author(s):

Vladimir Zimin ◽

Alexey Krylov ◽

Sergey Churilin ◽

Zikun Zhang

Keyword(s):

Strain State ◽

Element Model ◽

Space Structure ◽

Space Structures ◽

Elastic Rod ◽

Stress Strain ◽

Large Space ◽

Structure Dynamics ◽

Stress Strain State ◽

Large Space Structure

Today large space structures are in focus of attention of engineers and designers of rocket and space equipment. In ground-based experiments, it is not always possible to carry out complex tests of large space structure functionality. Therefore, the development of mathematical models describing properly the transformable structure dynamics when they opened from the densely packed transport state to the operating position in the orbit becomes very important. To determine the stress-strain state of the frame elements when it is unfolding the shape of the framework is taken at the moments when relative velocities of the adjacent sections are maximal. Supposed, that at these moments the frame elements are getting on the stops limiting their relative angular displacements, and the structure behaves as an elastic rod with specified characteristics. Numerical analysis of the stress-strain state in the framework is carried out by means of a finite element model. Therefore, the represented mathematical model can be effectively used to predict the functional suitability of such transformable space structures already on the early stages of their development.

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Research on Fire Resistance Performance of Pre-Stressed Suspended Steel Reticulated Shell

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.790 ◽

2010 ◽

Vol 163-167 ◽

pp. 790-794

Author(s):

Feng Bo Yu ◽

Xin Tang Wang ◽

Ming Zhou ◽

Wan Zhen Wang

Keyword(s):

High Temperature ◽

Fire Resistance ◽

Steel Structure ◽

Steel Structures ◽

Space Structure ◽

International Standards ◽

Large Space ◽

Finite Element Software ◽

Large Space Structure ◽

Fire Scene

Pre-stressed steel structures with large space are widely used in stadium, exhibition hall, theater and other buildings today. In order to study the fire-resistance behavior of suspended steel lattice shell of a stadium, the method of performance-based fire resistance design is used. First of all, the stadium physical model is established and the software FDS is used to determine the heating curves of the measuring points of the large space structure for two fire scenes. Compared with international standards heating curve, the heating curves of the large space structure obtained here has characteristic of local high-temperature. The finite element software MSC.MARC is further used to simulate the fire behavior of the pre-stressed steel structure with large space, in which the fire scene with 10MW design power of fire source and 30 minutes duration of fire are considered and two loading ways that overall non-uniform temperature field loading and the local high temperature components loading are accepted. The results show that the pre-stressed steel structure with large space has good fire resistance behavior, and the overall failure will not take place for the fire scene suggested here during 30 minutes duration of fire.

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A Switching Scheme for Mixed PZT-Based/Jet Thrusters Control of a Large Flexible Structure

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.1408609 ◽

2000 ◽

Vol 123 (4) ◽

pp. 722-727 ◽

Cited By ~ 3

Author(s):

A. Ferrara, ◽

L. Magnani, and ◽

R. Scattolini

Keyword(s):

Energy Consumption ◽

Control Strategy ◽

Vibration Suppression ◽

Space Structure ◽

Flexible Structure ◽

Control Performance ◽

Switching Scheme ◽

Large Space ◽

Large Space Structure ◽

Reduce Energy Consumption

Vibration suppression of a large space structure is achieved by switching between different actuators in order to optimize control performance and to reduce energy consumption. The theoretical properties of the proposed control strategy are reported together with some experimental results.

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