Large Space Structures Formed by Centrifugal Forces

✍ Scribed by Koshelev, V A.; Melnikov, V M

• Publisher: CRC Press
• Year: 2020
• Tongue: English
• Leaves: 162
• Edition: First edition
• Category: Library

✦ Synopsis

This book describes a feasible means of constructing such a reflector, as well as simple, reliable and low-cost structures for television and radio transmissions, debris removal from space and the development of solar sails for interplanetary missions. The aim of this book is thus to provide a comprehensive overview of the research in the technology of such space based structures expanded by centrifugal forces. The most promising concepts and design solutions for different applications are addressed. Particular emphasis is placed on deployment dynamics of space-based structures and their retrieval techniques: the reorientation of expanded film sheets in space, selecting film folding patterns, tethering systems, and deployment mechanisms, and controlling the deployment-retrieval process by space vehicles. Also featured are sections on ground and orbital simulation.;1. Analytical Overview 2. Status of Developments 3. Dynamics of Deployment from Stowed Configuration and Repackaging 4. In-Orbit Re-Orientation of Structures Expanded by Centrifugal Forces 5. Structures, Materials and Processes used to Fabricate Film Reflectors, Strength and Reflectance 6. Ground Experimental Simulation 7. Development of Space-Based Film Reflector of 20m Diameter (Znamya-2 Experiment) 8. Design Studies on Large Space Structures

✦ Table of Contents

Cover......Page 1
Half Title......Page 2
Title Page......Page 4
Copyright Page......Page 5
Table of Contents......Page 6
Preamble......Page 10
Chapter I: Introduction......Page 12
Chapter II: Analytical Overview. Status of Developments......Page 20
3.1.1. Folding Pattern, Rotational Moment, and Deployment Velocity Requirements......Page 26
3.1.2. Folding Patterns for Film and Tether Structures......Page 27
3.1.3. Torque Application Techniques......Page 35
3.1.4. Ways of Providing Controllable Deployment......Page 40
3.2. Mathematical Model for Split Reflector Controllable Deployment......Page 41
3.3. Mathematical Model of Solid Reflector Controllable Deployment......Page 45
3.4. Mathematical Model of Solid Reflector Uncontrolled Deployment......Page 49
3.5. Mathematical Model of Tether System Deployment......Page 54
3.6. Control of Counter-Rotating Systems......Page 59
3.7.1. Repackaging Process Features......Page 60
3.7.2. Mathematical Model of Repackaging Process......Page 61
3.8. Impacts of Longitudinal, Lateral, Torsional Oscillations and Space Environment Factors......Page 63
3.9. Simulation of Loads Applied to Electric Drives During Ground Verification......Page 64
3.10. Conclusions......Page 66
4.1. General Statements......Page 68
4.2. Mathematical Model of Tethered Weight Rotation......Page 69
4.3. Mathematical Model of Rotating Tether with Attached Distributed Mass and Weight at the End......Page 71
4.4. Mathematical Model of Rotating Solid Sheet......Page 73
5.1. Film Structure Operation Environment......Page 76
5.2. Film Materials and Their Properties......Page 78
5.3. Experimental Determination of Metallized Film Reflection Factor in Two-Dimensional Stress State......Page 80
5.3.1. Experimental Setup Description......Page 81
5.3.2. Optical Measurements Techniques......Page 82
5.3.3. Results of Measurements......Page 84
5.4.1 Durability Assessment Technique......Page 85
5.4.2. Experimental Setup and Test Methods......Page 86
5.4.3 . Test Results......Page 88
5.5. Radiation Resistance of Film Materials......Page 89
5.6. Designs of Film Structures......Page 91
5.7. Selection of Strength Characteristics. Surface Accuracy......Page 95
5.8. Reflector of Rotating, Uniformly Stressed Film Sheet......Page 96
6.1.2. Tethered System Deployment Mechanism Design......Page 100
6.1.3. Experimental Equipment......Page 104
6.1.4. Experimental Results......Page 105
6.2.1. Purposes and Objectives......Page 109
6.2.2. Experimental Setup. Identified Equipment......Page 112
6.2.3. Experimental Results......Page 114
6.3. Conclusions......Page 124
7.1. Developmental Concepts......Page 126
7.2. Reflector Folding Patterns and Deployment Dynamics......Page 127
7.3. Film Sheet Structure......Page 128
7.4. Reflector Deployment Mechanism Design......Page 129
7.5. Features of Experiment Program......Page 130
7.6. Theoretical Concept Versus Experimental Results......Page 131
8.1. Solar Sailing Vehicle Design......Page 138
8.2. Framed Reflector Design for Illumination of Arctic Regions......Page 139
8.3.1 . Subject of Investigations......Page 143
8.3.3. Principle Characteristics of the Dynamic Cable Loop Antenna......Page 145
8.3.4. Progress-M Vehicle Design Features Required for Parameter Experiment Implementation......Page 146
8.4.1. Problems of Space Debris......Page 147
8.4.2. Recoverable Detector......Page 148
8.4.3. Unrecoverable Detector......Page 149
9.1. Basic Design Criteria and Parameters......Page 152
9.2. Perturbations and Limitations Associated with In-Orbit Environment Effects......Page 155
9.3. General Concepts and Problems......Page 157
References......Page 160
Index......Page 162

✦ Subjects

TECHNOLOGY / Engineering / Mechanical;Electronic books