Space Technology Mission Directorate Update
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
RAD750 at Our Website: Click HERE RAD750 Board
Full-service, independent repair center -~ ARTISAN® with experienced engineers and technicians on staff. TECHNOLOGY GROUP ~I We buy your excess, underutilized, and idle equipment along with credit for buybacks and trade-ins. Custom engineering Your definitive source so your equipment works exactly as you specify. for quality pre-owned • Critical and expedited services • Leasing / Rentals/ Demos equipment. • In stock/ Ready-to-ship • !TAR-certified secure asset solutions Expert team I Trust guarantee I 100% satisfaction Artisan Technology Group (217) 352-9330 | [email protected] | artisantg.com All trademarks, brand names, and brands appearing herein are the property o f their respective owners. Find the BAE Systems RAD750 at our website: Click HERE RAD750 Board Hardware Specification Document Number 234A524 Release Date August 1, 2000 Copyright by BAE SYSTEMS All Rights Reserved Document Number: 234A524 RAD750 CompactPCI Hardware Specification Notices Before using this information and the product it supports, be sure to read the general information on the back cover of this book. Trademarks The following are trademarks of International Business Machines Corporation in the United States, or other countries, or both: IBM IBM Logo PowerPC PowerPC 750 The following are trademarks of BAE SYSTEMS in the United States, or other countries, or both: RAD750 The following are registered trademarks of PCI Industrial Computer Manufacturing Group in the United States, or other countries, or both: PICMG CompactPCI Other company, product, and service names may be trademarks or service marks of others. Preliminary Edition (Version 4.0, 8/1/2000) This unpublished document is the preliminary edition of RAD750 3U CompactPCI board Hardware Specification. -
Microkernel Mechanisms for Improving the Trustworthiness of Commodity Hardware
Microkernel Mechanisms for Improving the Trustworthiness of Commodity Hardware Yanyan Shen Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy School of Computer Science and Engineering Faculty of Engineering March 2019 Thesis/Dissertation Sheet Surname/Family Name : Shen Given Name/s : Yanyan Abbreviation for degree as give in the University calendar : PhD Faculty : Faculty of Engineering School : School of Computer Science and Engineering Microkernel Mechanisms for Improving the Trustworthiness of Commodity Thesis Title : Hardware Abstract 350 words maximum: (PLEASE TYPE) The thesis presents microkernel-based software-implemented mechanisms for improving the trustworthiness of computer systems based on commercial off-the-shelf (COTS) hardware that can malfunction when the hardware is impacted by transient hardware faults. The hardware anomalies, if undetected, can cause data corruptions, system crashes, and security vulnerabilities, significantly undermining system dependability. Specifically, we adopt the single event upset (SEU) fault model and address transient CPU or memory faults. We take advantage of the functional correctness and isolation guarantee provided by the formally verified seL4 microkernel and hardware redundancy provided by multicore processors, design the redundant co-execution (RCoE) architecture that replicates a whole software system (including the microkernel) onto different CPU cores, and implement two variants, loosely-coupled redundant co-execution (LC-RCoE) and closely-coupled redundant co-execution (CC-RCoE), for the ARM and x86 architectures. RCoE treats each replica of the software system as a state machine and ensures that the replicas start from the same initial state, observe consistent inputs, perform equivalent state transitions, and thus produce consistent outputs during error-free executions. -
Annual Report 2014 OUR VISION
AMOS Centre for Autonomous Marine Operations and Systems Annual Report 2014 Annual Report OUR VISION To establish a world-leading research centre for autonomous marine operations and systems: To nourish a lively scientific heart in which fundamental knowledge is created through multidisciplinary theoretical, numerical, and experimental research within the knowledge fields of hydrodynamics, structural mechanics, guidance, navigation, and control. Cutting-edge inter-disciplinary research will provide the necessary bridge to realise high levels of autonomy for ships and ocean structures, unmanned vehicles, and marine operations and to address the challenges associated with greener and safer maritime transport, monitoring and surveillance of the coast and oceans, offshore renewable energy, and oil and gas exploration and production in deep waters and Arctic waters. Editors: Annika Bremvåg and Thor I. Fossen Copyright AMOS, NTNU, 2014 www.ntnu.edu/amos AMOS • Annual Report 2014 Table of Contents Our Vision ........................................................................................................................................................................ 2 Director’s Report: Licence to Create............................................................................................................................. 4 Organization, Collaborators, and Facts and Figures 2014 ......................................................................................... 6 Presentation of New Affiliated Scientists................................................................................................................... -
Development of the Crew Dragon ECLSS
ICES-2020-333 Development of the Crew Dragon ECLSS Jason Silverman1, Andrew Irby2, and Theodore Agerton3 Space Exploration Technologies, Hawthorne, California, 90250 SpaceX designed the Crew Dragon spacecraft to be the safest ever flown and to restore the ability of the United States to launch astronauts. One of the key systems required for human flight is the Environmental Control and Life Support System (ECLSS), which was designed to work in concert with the spacesuit and spacecraft. The tight coupling of many subsystems combined with an emphasis on simplicity and fault tolerance created unique challenges and opportunities for the design team. During the development of the crew ECLSS, the Dragon 1 cargo spacecraft flew with a simple ECLSS for animals, providing an opportunity for technology development and the early characterization of system-level behavior. As the ECLSS design matured a series of tests were conducted, including with humans in a prototype capsule in November 2016, the Demo-1 test flight to the ISS in March 2019, and human-in-the-loop ground testing in the Demo-2 capsule in January 2020 before the same vehicle performs a crewed test flight. This paper describes the design and operations of the ECLSS, the development process, and the lessons learned. Nomenclature AC = air conditioning AQM = air quality monitor AVV = active vent valve CCiCap = Commercial Crew Integrated Capability CCtCap = Commercial Crew Transportation Capability CFD = computational fluid dynamics conops = concept of operations COPV = composite overwrapped -
(SAM) Alloy Parts Using X-Ray CT
Research Article ISSN 2639-9466 Nanotechnology & Applications Porosity Determination and Characterization of Binder Jet Printed Structural Amorphous Metal (SAM) Alloy Parts Using X-Ray CT Amamchukwu B. Ilogebe1*, Benedict Uzochukwu2, and Amy M. Elliot3 1North Carolina A&T State University, US. *Correspondence: Amamchukwu B. Ilogebe, North Carolina A&T State University, 2Virginia State University, US. US. 3Oak Ridge National Laboratory, US. Received: 04 November 2019; Accepted: 29 November 2019 Citation: Amamchukwu B. Ilogebe, Benedict Uzochukwu, Amy M. Elliot. Porosity Determination and Characterization of Binder Jet Printed Structural Amorphous Metal (SAM) Alloy Parts Using X-Ray CT. Nano Tech Appl. 2019; 2(1): 1-6. ABSTRACT The advent of Binder jet additive manufacturing continued to a revelation in the manufacture of intricate metal parts. This technology has been utilized in medical, aerospace and automotive industries, not much has been reported in the printing of parts from amorphous metal powders, which have found numerous applications in engineering because of their special properties. In this research, special emphasis was placed on two different manufacturing methods for structural amorphous metal alloy (SAM alloy); Die compaction and Binder jet printing. Samples of SAM alloy was created from these two-manufacturing methods and were subsequently, sintered, analyzed and compared. Previous studies show that as much as up to 50% porosity could be recorded in binder jet printing [1,2]. In this regard, different techniques were used to determine the percentage porosity from both manufacturing methods. The Archimedes method was used to determine the density and percentage porosity of the parts from the two methods. Similarly, percentage porosity was also determined using different tools in computed tomography (CT) analysis. -
Commercial Orbital Transportation Services
National Aeronautics and Space Administration Commercial Orbital Transportation Services A New Era in Spaceflight NASA/SP-2014-617 Commercial Orbital Transportation Services A New Era in Spaceflight On the cover: Background photo: The terminator—the line separating the sunlit side of Earth from the side in darkness—marks the changeover between day and night on the ground. By establishing government-industry partnerships, the Commercial Orbital Transportation Services (COTS) program marked a change from the traditional way NASA had worked. Inset photos, right: The COTS program supported two U.S. companies in their efforts to design and build transportation systems to carry cargo to low-Earth orbit. (Top photo—Credit: SpaceX) SpaceX launched its Falcon 9 rocket on May 22, 2012, from Cape Canaveral, Florida. (Second photo) Three days later, the company successfully completed the mission that sent its Dragon spacecraft to the Station. (Third photo—Credit: NASA/Bill Ingalls) Orbital Sciences Corp. sent its Antares rocket on its test flight on April 21, 2013, from a new launchpad on Virginia’s eastern shore. Later that year, the second Antares lifted off with Orbital’s cargo capsule, (Fourth photo) the Cygnus, that berthed with the ISS on September 29, 2013. Both companies successfully proved the capability to deliver cargo to the International Space Station by U.S. commercial companies and began a new era of spaceflight. ISS photo, center left: Benefiting from the success of the partnerships is the International Space Station, pictured as seen by the last Space Shuttle crew that visited the orbiting laboratory (July 19, 2011). More photos of the ISS are featured on the first pages of each chapter. -
Japan Cargo Spacecraft Docks at ISS 18 September 2009
Japan cargo spacecraft docks at ISS 18 September 2009 It was the first time that astronauts operate a Canadian robotic arm at the ISS to dock a spacecraft at the station. The HTV carried 4.5 tonnes of supplies, including food and daily necessities for the six ISS crew, as well as materials for experiments, such as seeds for growing plants in space. The 10-metre (33-foot) long cylindrical vehicle, which cost 20 billion yen (217 million dollars), will soon unload the supplies. It will later take waste materials and return to Earth, burning up as it re-enters the atmosphere. Japan has spent 68 billion yen developing the vehicle, which could be modified in future to carry Japan's first cargo spacecraft arrived at the International humans. Space Station on Friday after astronauts aboard the station grabbed and docked it using a robotic arm. The docking came a week after the Japan Aerospace (c) 2009 AFP Exploration Agency (JAXA) launched the unmanned HTV transportation vehicle atop an H-2B rocket (in picture). Japan's first cargo spacecraft arrived at the International Space Station (ISS) on Friday after astronauts aboard the station grabbed and docked it using a robotic arm. The docking came a week after the Japan Aerospace Exploration Agency (JAXA) launched the unmanned HTV transportation vehicle atop an H-2B rocket. The HTV is Japan's first freighter spacecraft aiming for a share of space transport after the retirement of the US space shuttle fleet next year. "I'm so relieved because I was feeling the pressure and responsibility," Koji Yamanaka, the flight director in charge of the cargo mission, told reporters at Japan's Tsukuba space centre. -
Espinsights the Global Space Activity Monitor
ESPInsights The Global Space Activity Monitor Issue 2 May–June 2019 CONTENTS FOCUS ..................................................................................................................... 1 European industrial leadership at stake ............................................................................ 1 SPACE POLICY AND PROGRAMMES .................................................................................... 2 EUROPE ................................................................................................................. 2 9th EU-ESA Space Council .......................................................................................... 2 Europe’s Martian ambitions take shape ......................................................................... 2 ESA’s advancements on Planetary Defence Systems ........................................................... 2 ESA prepares for rescuing Humans on Moon .................................................................... 3 ESA’s private partnerships ......................................................................................... 3 ESA’s international cooperation with Japan .................................................................... 3 New EU Parliament, new EU European Space Policy? ......................................................... 3 France reflects on its competitiveness and defence posture in space ...................................... 3 Germany joins consortium to support a European reusable rocket......................................... -
GUIDANCE, NAVIGATION, and CONTROL 2020 AAS PRESIDENT Carol S
GUIDANCE, NAVIGATION, AND CONTROL 2020 AAS PRESIDENT Carol S. Lane Cynergy LLC VICE PRESIDENT – PUBLICATIONS James V. McAdams KinetX Inc. EDITOR Jastesh Sud Lockheed Martin Space SERIES EDITOR Robert H. Jacobs Univelt, Incorporated Front Cover Illustration: Image: Checkpoint-Rehearsal-Movie-1024x720.gif Caption: “OSIRIS-REx Buzzes Sample Site Nightingale” Photo and Caption Credit: NASA/Goddard/University of Arizona Public Release Approval: Per multimedia guidelines from NASA Frontispiece Illustration: Image: NASA_Orion_EarthRise.jpg Caption: “Orion Primed for Deep Space Exploration” Photo Credit: NASA Public Release Approval: Per multimedia guidelines from NASA GUIDANCE, NAVIGATION, AND CONTROL 2020 Volume 172 ADVANCES IN THE ASTRONAUTICAL SCIENCES Edited by Jastesh Sud Proceedings of the 43rd AAS Rocky Mountain Section Guidance, Navigation and Control Conference held January 30 to February 5, 2020, Breckenridge, Colorado Published for the American Astronautical Society by Univelt, Incorporated, P.O. Box 28130, San Diego, California 92198 Web Site: http://www.univelt.com Copyright 2020 by AMERICAN ASTRONAUTICAL SOCIETY AAS Publications Office P.O. Box 28130 San Diego, California 92198 Affiliated with the American Association for the Advancement of Science Member of the International Astronautical Federation First Printing 2020 Library of Congress Card No. 57-43769 ISSN 0065-3438 ISBN 978-0-87703-669-2 (Hard Cover Plus CD ROM) ISBN 978-0-87703-670-8 (Digital Version) Published for the American Astronautical Society by Univelt, Incorporated, P.O. Box 28130, San Diego, California 92198 Web Site: http://www.univelt.com Printed and Bound in the U.S.A. FOREWORD HISTORICAL SUMMARY The annual American Astronautical Society Rocky Mountain Guidance, Navigation and Control Conference began as an informal exchange of ideas and reports of achievements among local guidance and control specialists. -
Human Asteroid Exploitation Mission Blue Team - Space Vehicle
SD2905 - HUMAN SPACEFLIGHT 1 Human asteroid exploitation mission Blue team - Space Vehicle Jeremy BEK, Clement´ BORNE, Anton KABJ˚ ORN¨ and Filippo POZZI Abstract—Asteroid rendez-vous and mining is one step Where a is one astronomical unit, MC the mass towards deep space exploration and interplanetary jour- of the Earth and M@ those of the Sun. The lunar neys, and it could prove to be a very lucrative endeavour. distance LD is 384 400 km so the asteroid is outside This paper tackles the space vehicle design associated of Earth’s sphere of influence. The orbital period with the hypothetical mission. It presents background, challenges and solutions linked with spacecraft design. The is one year, just like Earth, and so its seen period structure, mass, cost and technology readiness level (TRL) around Earth is also one year. This means that of the different systems composing the space vehicles are whichever trajectory is chosen, there is a launch described in the report. window every year at the same period. Index Terms—Spacecraft design, Asteroid, Mining, Technology Readiness Level. I. INTRODUCTION Designing a space vehicle for a certain mission is a complicated task that contains many parameters and variables. Even more so, for a particularly ambitious mission like asteroid mining. However, this paper constitutes a preliminary study of what Fig. 1. Orbit of 469219 Kamo’oalewa could resemble such a mission, from a vehicle point of view. The study tackles various topics, such as trajectory III. LAUNCHERS calculations, launcher considerations, or spacecraft The launch is the first part of a spaceflight. For the design. -
Process, Structure, Property and Applications of Metallic Glasses
AIMS Materials Science, 3(3): 1022-1053. DOI: 10.3934/matersci.2016.3.1022 Received: 15 March 2016 Accepted: 07 July 2016 Published: 26 July 2016 http://www.aimspress.com/journal/Materials Short review Process, structure, property and applications of metallic glasses Bindusri Nair and B. Geetha Priyadarshini * Nanotech Research Innovation and Incubation Centre, PSG Institute of Advanced Studies, Coimbatore, Tamil Nadu, India-641004 * Correspondence: Email: [email protected]. Abstract: Metallic glasses (MGs) are gaining immense technological significance due to their unique structure-property relationship with renewed interest in diverse field of applications including biomedical implants, commercial products, machinery parts, and micro-electro-mechanical systems (MEMS). Various processing routes have been adopted to fabricate MGs with short-range ordering which is believed to be the genesis of unique structure. Understanding the structure of these unique materials is a long-standing unsolved mystery. Unlike crystalline counterpart, the outstanding properties of metallic glasses owing to the absence of grain boundaries is reported to exhibit high hardness, excellent strength, high elastic strain, and anti-corrosion properties. The combination of these remarkable properties would significantly contribute to improvement of performance and reliability of these materials when incorporated as bio-implants. The nucleation and growth of metallic glasses is driven by thermodynamics and kinetics in non-equilibrium conditions. This comprehensive review article discusses the various attributes of metallic glasses with an aim to understand the fundamentals of relationship process-structure-property existing in such unique class of material. Keywords: metallic glasses; glass transition; amorphous; mechanical properties 1. Introduction Metallic Glasses (MG) are a class of materials which has caught the eye of many researchers since Klement et al’s [1] first work on Au-Si alloys in early 1960’s. -
Mechanical Behavior of Amorphous Alloys
Acta Materialia 55 (2007) 4067–4109 www.elsevier.com/locate/actamat Overview No. 144 Mechanical behavior of amorphous alloys Christopher A. Schuh a,*, Todd C. Hufnagel b, Upadrasta Ramamurty c a Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, M.I.T., Cambridge, MA 02139, USA b Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA c Department of Materials Engineering, Indian Institute of Science, Bangalore-560 012, India Received 14 August 2006; received in revised form 29 January 2007; accepted 31 January 2007 Available online 19 April 2007 Abstract The mechanical properties of amorphous alloys have proven both scientifically unique and of potential practical interest, although the underlying deformation physics of these materials remain less firmly established as compared with crystalline alloys. In this article, we review recent advances in understanding the mechanical behavior of metallic glasses, with particular emphasis on the deformation and fracture mechanisms. Atomistic as well as continuum modeling and experimental work on elasticity, plastic flow and localization, frac- ture and fatigue are all discussed, and theoretical developments are connected, where possible, with macroscopic experimental responses. The role of glass structure on mechanical properties, and conversely, the effect of deformation upon glass structure, are also described. The mechanical properties of metallic glass-derivative materials – including in situ and ex situ composites, foams and nanocrystal- reinforced glasses – are reviewed as well. Finally, we identify a number of important unresolved issues for the field. Ó 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Keywords: Metallic glass; Amorphous metal; Mechanical properties 1.