Download or read book Micro Cluster Propulsion for Nanosatellite Control Phase 1 written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the research, performed at Phrasor Scientific Inc. and the Mechanical Engineering Department at Stanford University, described in this STTR Phase I final report was to demonstrate the feasibility of using charged microclusters as a suitable candidate for micro-electric propulsion showing compatibility for adaptation to microelectro-mechanical systems (MEMS) fabrication. The research was carried out to explore the electrohydrodynamic (EHD) emission properties of microclusters from single micro-capillaries using diagnostic techniques developed for measuring microthruster performance in terms of specific impulse and thrust. The program demonstrated: that charged microclusters emission can occur from positive and negative voltages. A time-of-flight (TOF) data acquisition system was used to determine single micro-capillary emitter thruster performance. Specific impulses approx. 300s were achieved with a corresponding thrust level of approx. 1.25 micro-N. Research performed at Phrasor under another program reached Specific impulses of 500s. This thruster performance approaches levels which are acceptable for meeting AFOSR micro and nanospacecraft mission objectives once techniques are introduced for microfabricating arrays consisting of multiple micron-sized emitters. Propellant system emission studies also determined that higher levels of dopant along with lower flowrates will aid in the increase of charge-to-mass ratios in order to attain higher specific impulses.
Download or read book Space Micropropulsion for Nanosatellites written by Kean How Cheah and published by Elsevier. This book was released on 2022-03-19 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space Micropropulsion for Nanosatellites: Progress, Challenges and Future features the latest developments and progress, the challenges faced by different researchers, and insights on future micropropulsion systems. Nanosatellites, in particular cubesats, are an effective test bed for new technologies in outer space. However, most of the nanosatellites have no propulsion system, which subsequently limits their maneuverability in space. - Explains why nanosatellite requirements need unique micro-technologies to help develop a compliant propulsion system - Features an overview of nanosatellites and the global nanosatellite market - Covers chemical and electric micropropulsion and the latest developments
Download or read book Performance Testing of a Microfabricated Propulsion System for Nanosatellite Applications POSTPRINT written by and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing interest in the use of micro and nanosatellites within the aerospace community. Constellations of small satellites may eventually replace much larger, single function spacecraft as a cheaper, more flexible alternative. Micro-technologies will be required to enable small satellite missions including efficient, low-cost propulsion systems for maneuvering. A MEMS fabricated propulsion system has been developed for maneuvers on an upcoming University nanosatellite mission. The Free Molecule Micro-Resistojet (FMMR) is an electrothermal propulsion system designed for on-orbit maneuvers of nanosatellites, which are defined as spacecraft with an initial mass less than 10 kg. The FMMR has been tested using a torsion force balance to assess its performance using a variety of propellants including helium, argon, nitrogen and carbon dioxide. The experimental performance results compare favorably with results obtained from gas kinetic theory, which were used in the design phase to estimate the thruster's performance. The measured performance of the FMMR in this study has proven to be adequate to perform attitude control maneuvers for the University nanosatellite mission.
Download or read book Commerce Business Daily written by and published by . This book was released on 1998-10 with total page 1996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Free Molecule Micro Resistojet Nanosatellite Propulsion written by and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constellations and platoons of small satellites can offer an assortment of benefits over larger, single function spacecraft. The strict mass, volume, and power limitations of small satellites will require unique micro-technologies to help develop efficient propulsion systems for maneuvering. The Free Molecule Micro-Resistojet (FMMR) has been analyzed and tested in this study to determine its applicability for an upcoming Texas A & M (TAM) nanosatellite mission. The nanosatellite mission will demonstrate the performance and survivability of a water propelled FMMR for attitude control maneuvers and could mark the first meaningful operation of a Microelectromechanical Systems (MEMS) fabricated thruster in space. The Mark 3.1 design of the FMMR heater chip uses a deposited serpentine heater pattern to resistively heat a gaseous propellant expanding through long (13 mm), narrow (100 m) slots. Experimental data shows that the FMMR, with a heated wall temperature of 575 K, can attain a specific impulse of 65 seconds with a thrust level of 1.2 mN for a nitrogen gas propellant with a mass flow of 100 SCCM. The expected specific impulse when run on a water vapor propellant is expected to be 80 sec at similar thrust levels. Higher thrust levels can be achieved by increasing the temperature of the FMMR heater chip and/or the propellant mass flow through the expansion slots. The measured performance of the FMMR in this study has proven to be adequate to perform the attitude control maneuver for the TAM nanosatellite.
Download or read book Micropropulsion for Small Spacecraft written by Michael Matthew Micci and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2000 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micropropulsion is an enabling technology for microspacecraft operations. This work reports on the state of the art in micropropulsion concepts and activities, with survey papers, and sections on electrothermal, electrostatic, and electromagnetic thrusters and components. Topics include system considerations and design options, predicted performance and systems analysis of the free molecule micro-reistojet, and very low-power arcjets. Micci teaches aerospace engineering at Pennsylvania State University. Ketsdever is on the research staff at the Air Force Research Laboratory's Propulsion Directorate. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Space Microsystems and Micro Nano Satellites written by Zheng You and published by Butterworth-Heinemann. This book was released on 2017-11-22 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space Microsystems and Micro/Nano Satellites covers the various reasoning and diverse applications of small satellites in both technical and regulatory aspects, also exploring the technical and operational innovations that are being introduced in the field. The Space Microsystem developed by the author is systematically introduced in this book, providing information on such topics as MEMS micro-magnetometers, MIMUs (Micro-inertia-measurement unit), micro-sun sensors, micro-star sensors, micro-propellers, micro-relays, etc. The book also examines the new technical standards, removal techniques or other methods that might help to address current problems, regulatory issues and procedures to ameliorate problems associated with small satellites, especially mounting levels of orbital debris and noncompliance with radio frequency and national licensing requirements, liabilities and export controls, Summarizing the scientific research experiences of the author and his team, this book holds a high scientific reference value as it gives readers comprehensive and thorough introductions to the micro/nano satellite and space applications of MEMS technology. - Covers various reasoning and diverse applications for small satellites in both technical and regulatory aspects - Represents the first publication that systematically introduces the Space Microsystem developed by the author - Examines new technical standards, removal techniques and other methods that might help to address current problems, regulatory issues and procedures
Download or read book Ion Micro propulsion and Cost Modeling for Satellite Clusters written by Gregory John Yashko and published by . This book was released on 1998 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microsatellites as Research Tools written by F.-B. Hsiao and published by Elsevier. This book was released on 1999-03-12 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to reflect the increasing importance and interest of the microsatellites in high technology and scientific applications in space, the Colloquium on Microsatellites as Research Tools was organized to promote its usage and technology development and to foster the international cooperation, especially in the area of the Asia pacific region.Attended by 150 participants from 18 countries the colloquium was organized into five major themes: regional development, lessons learned, innovations, scientific applications, and education. A special session was organized as well by the organizing committee and supported by the National Space Program Office to present its development of the Taiwan's satellite program and the current status of ROCSAT-1 which is scheduled to be launched at the beginning of 1999.Two main conclusions were drawn from the material presented: microsatellite in general is a very good means for doing space research and technology development, and a suitable vehicle to promote international collaborations.
Download or read book Smaller Satellites Bigger Business written by Michael J Rycroft and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Y. Fujimori, Symposium Programme Committee Chair, and Faculty Member, International Space University e-mail: [email protected] M.Rycroft, Faculty Member, International Space University e-mail: [email protected] N. Crosby, International Space University e-mail: [email protected] For the sixth annual ISU Symposium the theme was "Smaller Satellites: Bigger Business? Concepts, Applications and Markets for Micro/Nanosatellites in a New Information World". Thus, the Symposium addressed the crucial question: are small satellites the saviour of space programmes around the world It did this from the unique perspective of the International Space today? University - the interdisciplinary, international and intercultural perspective. This Symposium brought together a variety of people working on small satellites - engineers, scientists, planners, providers, operators, policy makers and business executives, together with representatives from regulatory bodies, from national and international organizations, and from the finance sector, and also entrepreneurs. Discussion and debate were encouraged, based on the papers presented and those published here.
Download or read book Laser Applications in Microelectronic and Optoelectronic Manufacturing written by and published by . This book was released on 1999 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CubeSat Handbook written by Chantal Cappelletti and published by Academic Press. This book was released on 2020-09-25 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: CubeSat Handbook: From Mission Design to Operations is the first book solely devoted to the design, manufacturing, and in-orbit operations of CubeSats. Beginning with an historical overview from CubeSat co-inventors Robert Twiggs and Jordi Puig-Suari, the book is divided into 6 parts with contributions from international experts in the area of small satellites and CubeSats. It covers topics such as standard interfaces, on-board & ground software, industry standards in terms of control algorithms and sub-systems, systems engineering, standards for AITV (assembly, integration, testing and validation) activities, and launch regulations. This comprehensive resource provides all the information needed for engineers and developers in industry and academia to successfully design and launch a CubeSat mission. - Provides an overview on all aspects that a CubeSat developer needs to analyze during mission design and its realization - Features practical examples on how to design and deal with possible issues during a CubeSat mission - Covers new developments and technologies, including ThinSats and PocketQubeSats
Download or read book Orbital Mechanics and Formation Flying A Digital Control Perspective written by P. A. Capo-Lugo and published by Woodhead Publishing. This book was released on 2017-11-13 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aimed at students, faculty and professionals in the aerospace field, this book provides practical information on the development, analysis, and control of a single and/or multiple spacecraft in space. This book is divided into two major sections: single and multiple satellite motion. The first section analyses the orbital mechanics, orbital perturbations, and attitude dynamics of a single satellite around the Earth. Using the knowledge of a single satellite motion, the translation of a group of satellites called formation flying or constellation is explained. Formation flying has been one of the main research topics over the last few years and this book explains different control approaches to control the satellite attitude motion and/or to maintain the constellation together. The control schemes are explained in the discrete domain such that it can be easily implemented on the computer on board the satellite. The key objective of this book is to show the reader the practical and the implementation process in the discrete domain. Explains the orbital motion and principal perturbations affecting the satelliteUses the Ares V rocket as an example to explain the attitude motion of a space vehiclePresents the practical approach for different control actuators that can be used in a satellite
Download or read book Achieving Science with CubeSats written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-11-06 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space-based observations have transformed our understanding of Earth, its environment, the solar system and the universe at large. During past decades, driven by increasingly advanced science questions, space observatories have become more sophisticated and more complex, with costs often growing to billions of dollars. Although these kinds of ever-more-sophisticated missions will continue into the future, small satellites, ranging in mass between 500 kg to 0.1 kg, are gaining momentum as an additional means to address targeted science questions in a rapid, and possibly more affordable, manner. Within the category of small satellites, CubeSats have emerged as a space-platform defined in terms of (10 cm x 10 cm x 10 cm)- sized cubic units of approximately 1.3 kg each called "U's." Historically, CubeSats were developed as training projects to expose students to the challenges of real-world engineering practices and system design. Yet, their use has rapidly spread within academia, industry, and government agencies both nationally and internationally. In particular, CubeSats have caught the attention of parts of the U.S. space science community, which sees this platform, despite its inherent constraints, as a way to affordably access space and perform unique measurements of scientific value. The first science results from such CubeSats have only recently become available; however, questions remain regarding the scientific potential and technological promise of CubeSats in the future. Achieving Science with CubeSats reviews the current state of the scientific potential and technological promise of CubeSats. This report focuses on the platform's promise to obtain high- priority science data, as defined in recent decadal surveys in astronomy and astrophysics, Earth science and applications from space, planetary science, and solar and space physics (heliophysics); the science priorities identified in the 2014 NASA Science Plan; and the potential for CubeSats to advance biology and microgravity research. It provides a list of sample science goals for CubeSats, many of which address targeted science, often in coordination with other spacecraft, or use "sacrificial," or high-risk, orbits that lead to the demise of the satellite after critical data have been collected. Other goals relate to the use of CubeSats as constellations or swarms deploying tens to hundreds of CubeSats that function as one distributed array of measurements.
Download or read book A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs written by National Research Council and published by National Academies Press. This book was released on 2007-01-14 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rocket and air-breathing propulsion systems are the foundation on which planning for future aerospace systems rests. A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs assesses the existing technical base in these areas and examines the future Air Force capabilities the base will be expected to support. This report also defines gaps and recommends where future warfighter capabilities not yet fully defined could be met by current science and technology development plans.
Download or read book Small Satellites for Earth Observation written by Rainer Sandau and published by Springer Science & Business Media. This book was released on 2008-04-18 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 6th IAA Symposium on Small Satellites for Earth Observation, initiated by the International Academy of Astronautics (IAA), was again hosted by DLR, the German Aerospace Center. The participation of scientists, engineers, and managers from 24 countries reflected the high interest in the use of small satellites for dedicated missions applied to Earth observation. The contributions showed that dedicated Earth observation missions cover a wide range of very different tasks.
Download or read book Performance Evaluation of the SPT 140 written by and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
