Commercialization of Deployable Space Systems' roll-out solar array (ROSA) technology for Space Systems Loral (SSL) solar arrays

2016 ◽  
Author(s):  
Bao Hoang ◽  
Steve White ◽  
Brian Spence ◽  
Steven Kiefer
Keyword(s):  
Solar Array ◽  
Space Systems ◽  
Solar Arrays ◽  
Roll Out

Dynamic Modeling for a Flexible Spacecraft With Solar Arrays Composed of Honeycomb Panels and Its Proportional–Derivative Control With Input Shaper

2016 ◽  
Vol 138 (8) ◽  
Author(s):  
Lun Liu ◽  
Dengqing Cao
Keyword(s):  
Dynamic Model ◽  
Vibration Suppression ◽  
Hybrid Control ◽  
Flexible Spacecraft ◽  
Solar Array ◽  
Pd Controller ◽  
Pd Control ◽  
Solar Arrays ◽  
Attitude Maneuver ◽  
The One

A high-precision dynamic model of a flexible spacecraft installed with solar arrays, which are composed of honeycomb panels, is established based on the nonconstrained modes of flexible appendages (solar arrays), and an effective cooperative controller is designed for attitude maneuver and vibration suppression by integrating the proportional–derivative (PD) control and input shaping (IS) technique. The governing motion equations of the system and the corresponding boundary conditions are derived by using Hamiltonian Principle. Solving the linearized form of those equations with associated boundaries, the nonconstrained modes of solar arrays are obtained for deriving the discretized dynamic model. Applying this discretized model and combining the IS technique with the PD controller, a hybrid control scheme is designed to achieve the attitude maneuver of the spacecraft and vibration suppression of its flexible solar arrays. The numerical results reveal that the nonconstrained modes of the system are significantly influenced by the spacecraft flexibility and honeycomb panel parameters. Meanwhile, the differences between the nonconstrained modes and the constrained ones are growing as the spacecraft flexibility increases. Compared with the pure PD controller, the one integrating the PD control and IS technique performs much better, because it is more effective for suppressing the oscillation of attitude angular velocity and the vibration of solar array during the attitude maneuver, and reducing the residual vibration after the maneuver process.

On-orbit validation of the roll-out solar array

2018 ◽  
Author(s):  
Jeremy Banik ◽  
Steve Kiefer ◽  
Matt LaPointe ◽  
Pete LaCorte
Keyword(s):  
Solar Array ◽  
Roll Out

Developing methods for taking into account the radiation coming from Earth in simulations of incoming electric power on the Russian Segment of the International Space Station in experiment Albedo

2021 ◽  
pp. 125-140
Author(s):  
Dmitriy N. RULEV
Keyword(s):  
Electric Power ◽  
International Space Station ◽  
Power Supply ◽  
Power Supply System ◽  
Space Station ◽  
Power Input ◽  
Solar Array ◽  
International Space ◽  
Solar Arrays ◽  
Array Performance

The paper describes the implementation of space experiment Albedo, which provided a framework for developing methods of taking into account the radiation emitted by the system «atmosphere–underlying terrain» in simulations of the operation of the power supply system of the Russian Segment of the International Space Station. As a result of the implementation of the space experiment a procedure was developed for determining and using characteristics of radiation coming from Earth in the simulation of a space station power supply system, including procedures and special software for determining solar array performance and simulating power input coming from solar arrays taking into account Earth albedo, as well as recommendations are given for the control modes of power supply systems of orbital spacecraft. As a result of testing computational schemes for evaluating the solar array performance and simulating electric power output that takes into account the Earth albedo, substantiated values were obtained for the proposed reference parameter for evaluating the performance of solar arrays of the Service Module of the International Space Station. Key words: Russian Segment of the International Space Station, solar arrays, electric power input, solar array performance estimate, radiation coming from Earth, albedo.

Synchronized Operation of Grid Power, Solar Power, and Battery for Smart Energy Management

2018 ◽  
pp. 255-291 ◽  
Author(s):  
Pawan Kumar ◽  
Dip V. Thanki
Keyword(s):  
Energy Demand ◽  
Solar Array ◽  
Solar Arrays ◽  
Load Demand ◽  
Perturb And Observe ◽  
Smart Energy Management ◽  
Site Evaluation ◽  
Pros And Cons ◽  
Solar Powered ◽  
Power Point

This chapter gives details of solar photovoltaic, starting from its general pros and cons. It covers the basics of site evaluation when installing a solar powered plant and various ways to overcome the uncertainties in the predicted output of the solar arrays. The efficiency of the plant can be improved with the help of maximum power point tracker (MPPT), which works on algorithms based on perturb and observe, incremental conductance, constant voltage, etc. The output of the solar PV arrays can be utilized more effectively by integrating it with grid to supply ac loads. This integration requires a power conditioning system (PCS), enabling smooth operation. Continuity of supply can be maintained by having a battery backup, for the time when both grid and solar array fail to meet the load demand. Such a system can have wide range of applications and has the potential to meet the energy demand.

Synchronized Operation of Grid Power, Solar Power, and Battery for Smart Energy Management

2022 ◽  
pp. 1231-1267
Author(s):  
Pawan Kumar ◽  
Dip V. Thanki
Keyword(s):  
Energy Demand ◽  
Solar Array ◽  
Solar Arrays ◽  
Load Demand ◽  
Perturb And Observe ◽  
Smart Energy Management ◽  
Site Evaluation ◽  
Pros And Cons ◽  
Solar Powered ◽  
Power Point

This chapter gives details of solar photovoltaic, starting from its general pros and cons. It covers the basics of site evaluation when installing a solar powered plant and various ways to overcome the uncertainties in the predicted output of the solar arrays. The efficiency of the plant can be improved with the help of maximum power point tracker (MPPT), which works on algorithms based on perturb and observe, incremental conductance, constant voltage, etc. The output of the solar PV arrays can be utilized more effectively by integrating it with grid to supply ac loads. This integration requires a power conditioning system (PCS), enabling smooth operation. Continuity of supply can be maintained by having a battery backup, for the time when both grid and solar array fail to meet the load demand. Such a system can have wide range of applications and has the potential to meet the energy demand.

Solar Effects on Tensile and Optical Properties of Hubble Space Telescope Silver-Teflon Insulation

2006 ◽  
Vol 929 ◽  
Author(s):  
Kim K. de Groh ◽  
Joyce A. Dever ◽  
Aaron Snyder ◽  
Sharon Kaminski ◽  
Catherine E. McCarthy ◽  
...  
Keyword(s):  
Radiation Effects ◽  
Hubble Space Telescope ◽  
Strong Dependence ◽  
Thermal Control ◽  
Space Environment ◽  
Solar Array ◽  
Solar Absorptance ◽  
Space Telescope ◽  
Solar Arrays ◽  
Solar Exposure

ABSTRACTDuring the fourth servicing mission of the Hubble Space Telescope (HST), the second set of solar arrays (SA-II) was replaced with a third set and the SA-II was brought back to Earth. A section of the retrieved SA-II solar array drive arm (SADA) multilayer insulation (MLI), which experienced 8.25 years of space exposure, was provided to NASA Glenn Research Center for environmental durability analyses of the top layer of silver-Teflon fluorinated ethylene propylene (Ag-FEP). Because the SADA MLI had solar and anti-solar facing surfaces and was exposed to the space environment for a long duration, it provided a unique opportunity to study solar effects on environmental degradation of Ag-FEP, a commonly used spacecraft thermal control material. Therefore, the objective of this research was to characterize the degradation of retrieved HST SADA Ag-FEP with particular emphasis on solar radiation effects. Data obtained included tensile properties, solar absorptance, surface morphology and chemistry. The solar facing surface of the SADA was found to be extremely embrittled and contained numerous through-thickness cracks. Tensile testing indicated that the solar facing surface lost 60% of its mechanical strength and 90% of its elasticity while the anti-solar facing surface had ductility similar to pristine FEP. The solar absorptance of both the solar facing surface (0.155 ± 0.032) and the anti-solar facing surface (0.208 ± 0.012) were found to be greater than pristine Ag-FEP (0.074). Solar facing and anti-solar facing surfaces were microscopically textured, and locations of isolated contamination were present on the anti-solar surface resulting in increased localized texturing. Yet, the overall texture was significantly more pronounced on the solar facing surface indicating a synergistic effect of combined solar exposure and increased heating with atomic oxygen erosion. The results indicate a very strong dependence of degradation, particularly embrittlement, upon solar exposure with orbital thermal cycling having a significant effect.

On-orbit Photogrammetry Analysis of the Roll-Out Solar Array (ROSA)

2019 ◽  
Author(s):  
Jeremy Banik ◽  
Race Kramer ◽  
Donn Liddle ◽  
Mark Shortis
Keyword(s):  
Solar Array ◽  
Roll Out

Review on the Research of Dynamic Characteristics for Spacecraft Solar Arrays

2013 ◽  
Vol 584 ◽  
pp. 261-267
Author(s):  
Ze Hao Pan ◽  
Jia Ning Wu ◽  
Shao Ze Yan ◽  
Jie Liang Zhao
Keyword(s):  
Dynamic Characteristics ◽  
Damping Ratio ◽  
Solar Array ◽  
Future Research ◽  
New Materials ◽  
Thermally Induced ◽  
Solar Arrays ◽  
Research Areas ◽  
Multiple Dimensions ◽  
The Relationship

In this paper, a review of developments in the dynamic characteristics of traditional and inflatable solar array is presented. Three major aspects that affect the dynamic behavior of solar array are reviewed: component flexibility, joint clearance and thermally induced vibration. Important results and methods of exploring the dynamic characteristics of inflatable solar array are discussed. Future research areas in dynamic characteristics of solar array are identified as damping mechanism of inflatable structure, the relationship between pressurization level and damping ratio, application of more advanced contact model, dynamic characteristics of solar array made of new materials and consideration of deformation in multiple dimensions.

Development of a Novel, Passively Deployed Roll-Out Solar Array

2006 ◽  
Author(s):  
D. Campbell ◽  
R. Barrett ◽  
M.S. Lake ◽  
L. Adams ◽  
E. Abramson ◽  
...  
Keyword(s):  
Solar Array ◽  
Roll Out
Sign in / Sign up

Export Citation Format

Share Document