Recent Advances In Gossamer Spacecraft
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Recent Advances In Gossamer Spacecraft
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Author : C. H. Jenkins
language : en
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
Release Date : 2006
Recent Advances In Gossamer Spacecraft written by C. H. Jenkins and has been published by AIAA (American Institute of Aeronautics & Astronautics) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Technology & Engineering categories.
The pace of progress in gossamer technology has been strong since the publication of Gossamer Spacecraft: Membrane and Inflatable Structures Technology for Space Applications in 2001. Solar sails are an obvious and public evidence of this trend. But there have been many other advances as well in structures, materials, testing, and systems engineering. Recent Advances in Gossamer Spacecraft focuses on many of these, either as gossamer technology that was not sufficiently represented in the previous volume, or that has had significant growth and activity in the intervening years. The most accurate and up-to-date information has been assembled, reviewed, and presented by an outstanding group of experts.
Progress In Astronautics And Aeronautics
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Author : C. H. Jenkins
language : en
Publisher: AIAA
Release Date : 2001
Progress In Astronautics And Aeronautics written by C. H. Jenkins and has been published by AIAA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Expandable space structures categories.
Gossamer Spacecraft
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Author : C. H. Jenkins
language : en
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
Release Date : 2001
Gossamer Spacecraft written by C. H. Jenkins and has been published by AIAA (American Institute of Aeronautics & Astronautics) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Medical categories.
A study of membrane and inflatable structures technology for space applications. It provides an overview and historical review of the subject; theoretical discussion of the mechanics and physics of membrane structures, and chemical and processing issues; and applications and case studies.
Photogrammetry Methodology Development For Gossamer Spacecraft Structures
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Author :
language : en
Publisher:
Release Date : 2002
Photogrammetry Methodology Development For Gossamer Spacecraft Structures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Expandable space structures categories.
Photogrammetry Methodology Development For Gossamer Spacecraft Structures
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-19
Photogrammetry Methodology Development For Gossamer Spacecraft Structures written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-19 with categories.
Photogrammetry--the science of calculating 3D object coordinates from images--is a flexible and robust approach for measuring the static and dynamic characteristics of future ultra-lightweight and inflatable space structures (a.k.a., Gossamer structures), such as large membrane reflectors, solar sails, and thin-film solar arrays. Shape and dynamic measurements are required to validate new structural modeling techniques and corresponding analytical models for these unconventional systems. This paper summarizes experiences at NASA Langley Research Center over the past three years to develop or adapt photogrammetry methods for the specific problem of measuring Gossamer space structures. Turnkey industrial photogrammetry systems were not considered a cost-effective choice for this basic research effort because of their high purchase and maintenance costs. Instead, this research uses mainly off-the-shelf digital-camera and software technologies that are affordable to most organizations and provide acceptable accuracy. Pappa, Richard S. and Jones, Thomas W. and Black, Jonathan T. and Walford, Alan and Robson, Stuart and Shortis, Mark R. Langley Research Center NASA/TM-2002-211739, L-18200, NAS 1.15:211739, AIAA Paper 2002-1375
Attitude Dynamics And Shape Control Of Reflectivity Modulated Gossamer Spacecraft
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Author : Andreas J. Borggräfe
language : en
Publisher:
Release Date : 2015
Attitude Dynamics And Shape Control Of Reflectivity Modulated Gossamer Spacecraft written by Andreas J. Borggräfe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The utilisation of space provides many opportunities to deliver pioneering innovations during the 21st century. One of these opportunities is the gossamer spacecraft, an emerging technology to achieve very low mass, large area and low stowage volume. Examples include large ultra-lightweight membrane reflectors and distributed tethered formations. Gossamer spacecraft offer the potential to deliver innovative new science and applications missions to aid our growing globalised societies: high-performing communications antennae, scientific telescopes and space-based solar power collectors. However, the ability to control such large structures in space is essential for their successful operation. To this aim, this thesis investigates a novel means to control large gossamer spacecraft by exploiting modulated solar radiation pressure (SRP), thus by modifying the nominal light pressure acting on the structure in space. Various concepts have been proposed in the past to control the attitude of a gossamer spacecraft, employing complex mechanical systems or thrusters. Furthermore, methods to control the surface shape of a large membrane reflector using, for example, piezoelectric actuators, are being developed. Since on-board control systems need to be high-performance, reliable and importantly lightweight, this thesis investigates the use of thin-film reflectivity control devices across the spacecraft surface. Controlling the reflectivity modulates the Sun's light pressure acting on a thin membrane thus controlling its shape. In addition, body forces and torques become available to control the attitude of such a large structure 'optically', without using traditional mechanical systems. The concept is demonstrated first by controlling a two-mass tethered formation in a Sun-centred orbit, showing that the spacecraft attitude can be stabilised around new equilibria created by controlling the surface reflectivity of the masses. Subsequently, the concept is applied to control the attitude of a large membrane reflector, which confirms the viability of reflectivity modulation by generating variable optical torques in the membrane plane. In particular, the nominal SRP forces are modified by introducing different surface reflectivity distributions across the membrane. It is shown that through these optical torques, the reflector can be steered, for example, to a Sunpointing attitude from an arbitrary initial displacement. The analysis also considers the variation of the SRP force magnitude with changing light incidence angle towards the Sun during the manoeuvre, thereby presenting solutions to a challenging attitude control problem. Furthermore, by adopting a highly-integrated multi-functional design approach, the concept of reflectivity modulation is also employed to control the surface shape of a large membrane reflector. First, the nominal (non-parabolic) deflection shapes due to uniform SRP across the surface are presented. Subsequently, a closed-form solution for the reflectivity function across the membrane required to create a true parabolic deflection shape is derived. In order to improve the quite large focal lengths of the deflected shapes that can be generated for a tensioned membrane, shape control of a slack suspended surface is also considered. The achievable (shorter) focal lengths support the feasibility of exploiting modulated SRP for controlled surface deflection. In summary, this thesis demonstrates the potential of using surface reflectivity modulation to control the attitude and morphology of large gossamer spacecraft without using complex mechanical systems or thrusters. Therefore, the concept of optical control represents a major step towards highly-integrated adaptive gossamer structures and supports the development of this promising key-technology to deliver advanced space applications.
Structural Dynamics Experimental Activities In Ultra Lightweight And Inflatable Space Structures
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Author : Richard S. Pappa
language : en
Publisher:
Release Date : 2001
Structural Dynamics Experimental Activities In Ultra Lightweight And Inflatable Space Structures written by Richard S. Pappa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Air-supported structures categories.
This paper reports recently completed structural dynamics experimental activities with new ultra-lightweight and inflatable space structures (a.k.a., "Gossamer" spacecraft) at NASA Langley Research Center, NASA Marshall Space Flight Center, and NASA Goddard Space Flight Center. Nine aspects of this work are covered: 1) inflated, rigidized tubes, 2) active control experiments, 3) photogrammetry, 4) laser vibrometry, 5) modal tests of inflatable structures, 6) in-vacuum modal tests, 7) tensioned membranes, 8) deployment tests, and 9) flight experiment support. Structural dynamics will play a major role in the design and eventually in-space deployment and performance of Grossamer spacecraft. Experimental research and development such as this is required to validate new analysis methods.
Concepts And Mechanics Of Inflatable Gossamer Spacecraft
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Author : Mark S. Lake
language : en
Publisher:
Release Date : 2004
Concepts And Mechanics Of Inflatable Gossamer Spacecraft written by Mark S. Lake and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Discussion Meeting On Gossamer Sapcecraft
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Author : Jet Propulsion Laboratory (U.S.)
language : en
Publisher:
Release Date : 1980
Discussion Meeting On Gossamer Sapcecraft written by Jet Propulsion Laboratory (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Microspacecraft categories.
This document presents a review of a two-day meeting to examine the concepts, technology, and application of ultralightweight structures in space. These structures are referred to here as Gossamer Spacecraft, and they represent a generic class of space vehicle or structure characterized by a low mass per unit area ... Typical Gossamer concepts include the solar sail, the space tether, and various two- and three-dimensional, large, lightweight structures that can be deployed or assembled in space. The Gossamer Spacecraft has a high potential for use as a transportation deveice (solar sail), as a science instrument (reflecting or occulting antenna), or as a large structural component for an enclosure, manned platform, or other human habitat. Inflatable structures appear to be one possible building element for large ultralightweight structures in space." -- P. vii.
Recent Advances In Machines And Mechanisms
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Author : Vijay Kumar Gupta
language : en
Publisher: Springer Nature
Release Date : 2022-10-04
Recent Advances In Machines And Mechanisms written by Vijay Kumar Gupta and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-04 with Technology & Engineering categories.
This book presents the proceedings of 5th International and 20th National Conference on Machines and Mechanisms (iNaCoMM 2021) held at PDPM IIITDM Jabalpur during 9-11 December 2021. The conference was held in collaboration with the Association of Machines and Mechanisms (AMM) India and International Federation for the Promotion of Mechanism and Machine sciences (IFToMM). Various topics covered in this book include kinematics and dynamics of machines, compliant mechanisms; gear, cams and power transmission systems; mechanisms and machines for rural, agricultural and industrial applications; mechanisms for space applications; mechanisms for energy harvesting; robotics and automation; human-centric robotics; soft robotics; man-machine system, mechatronics and micro–mechanisms; CAD and CAGD; control of machines; vibration of machines & rotor dynamics; acoustic and noise; tribology; condition monitoring and failure analysis; fault diagnosis and health monitoring; biomedical engineering; and composites and advanced materials. Given the contents, the book will be useful for researchers and professionals working in the various domains of mechanical engineering.