The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform
Nasa - One of the best experts on this subject based on the ideXlab platform.
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Technology for Future NASA Missions: Civil Space Technology Initiative (CSTI) and Pathfinder
2019Co-Authors: NasaAbstract:Information is presented in viewgraph form on a number of related topics. Information is given on orbit transfer vehicles, Spacecraft instruments, spaceborne experiments, university/industry programs, Spacecraft propulsion, life support systems, cryogenics, Spacecraft Power Supplies, human factors engineering, Spacecraft construction materials, aeroassist, aerobraking and aerothermodynamics.
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Small business innovation research. Abstracts of completed 1987 phase 1 projects
2019Co-Authors: NasaAbstract:Non-proprietary summaries of Phase 1 Small Business Innovation Research (SBIR) projects supported by NASA in the 1987 program year are given. Work in the areas of aeronautical propulsion, aerodynamics, acoustics, aircraft systems, materials and structures, teleoperators and robotics, computer sciences, information systems, Spacecraft systems, Spacecraft Power Supplies, Spacecraft propulsion, bioastronautics, satellite communication, and space processing are covered.
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Large space structures and systems in the space station era: A bibliography with indexes (supplement 03)
2019Co-Authors: NasaAbstract:Bibliographies and abstracts are listed for 1221 reports, articles, and other documents introduced into the NASA scientific and technical information system between January 1, 1991 and June 30, 1991. Topics covered include large space structures and systems, space stations, extravehicular activity, thermal environments and control, tethering, Spacecraft Power Supplies, structural concepts and control systems, electronics, advanced materials, propulsion, policies and international cooperation, vibration and dynamic controls, robotics and remote operations, data and communication systems, electric Power generation, space commercialization, orbital transfer, and human factors engineering.
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Space Cell Test Program
2019Co-Authors: Nasa, Naval Ammunition DepotAbstract:Environmental testing of nickel-cadmium, silver-zinc, silver-cadmium, and zinc-oxygen batteries for Spacecraft Power Supplies
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The 1975 GSFC Battery Workshop
2013Co-Authors: NasaAbstract:The proceedings of the 1975 Goddard Space Flight Center Battery Workshop are presented. The major topics of discussion were nickel cadmium batteries and, to a lesser extent, nickel hydrogen batteries. Battery design, manufacturing techniques, testing programs, and electrochemical characteristics were considered. The utilization of these batteries for Spacecraft Power Supplies was given particular attention.
L. Garraud - One of the best experts on this subject based on the ideXlab platform.
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Soft switching techniques to improve the performances of standard DC-DC converter modules
1998Co-Authors: M. Fabrega, L. GarraudAbstract:In the Spacecraft Power Supplies field, driven by the increasing integration of the equipments (ASIC's...), the hard trend is to reduce mass and volume of these functions. These requirements lead so to use, more and more, integrated standard DC-DC converters modules to built the Power cell of the new Power Supplies. This paper summarizes the main results of the work performed in the frame of a CNES R/D contract concerning a 50 W module for new payload applications. It presents the significant technical improvements with soft switching techniques allowing to increase the switching frequency with keeping good efficiency and technological improvements with high integration. A DC-DC converters module (± 3.3 V, ± 12 V ; 50 W) preliminary definition and main performances with such innovative solutions are presented.
E. A. Skrabek - One of the best experts on this subject based on the ideXlab platform.
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Kirk-Othmer Encyclopedia of Chemical Technology - Thermoelectric Energy Conversion
Kirk‐Othmer Encyclopedia of Chemical Technology, 2000Co-Authors: E. A. SkrabekAbstract:Thermoelectric energy conversion is the science of the interchange of thermal and electrical energy in simple solid-state devices, generally heavily doped semiconductors. Thermoelectric devices can be used to generate electrical Power, to refrigerate, or to transfer large amounts of heat without the use of freons or compressors or any rotating machinery. As well as providing the historical background and summaries on materials and technology, this article discusses such topics as thermoelectric effects, Power generation, and cooling. It also provides summary descriptions of a number of applications of thermoelectric Power Supplies and coolers. These include Spacecraft Power Supplies, remote location Power systems on earth and newer commercial devices which could benefit the environment. Keywords: History; Thermoelectric energy conversion; Thermoelectric effects; Power generation; Thermoelectric cooling; Generators; Space launch
Fan Huanzhen - One of the best experts on this subject based on the ideXlab platform.
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Research on Health Condition Assessment Method for Spacecraft Power Control System Based on SVM and Cloud Model
2019 Prognostics and System Health Management Conference (PHM-Paris), 2019Co-Authors: Yi Xiong, Zhongdong Jiang, Hongzheng Fang, Fan HuanzhenAbstract:Health condition assessment method can effectively ensure the performance and health status of the key components and equipment of the Spacecraft Power supply system, enhance the efficiency of Spacecraft in orbit. Aiming at the problems of health level classification and uncertainty mapping in the health assessment application of Spacecraft Power control system, the algorithm strategy of combining support vector machine (SVM) and cloud model is proposed to realize the health status measurement of Spacecraft Power control system. Then the implementation strategy and main processes of the algorithm are described. Finally, using the historical in-orbit operation data of a Spacecraft Power control system, the health status evaluation of the Spacecraft Power system based on SVM and cloud model is realized, and the effectiveness of the method is verified. The results show that the method can effectively evaluate the performance and health of the key equipment of the Spacecraft Power system. It can be used as a support for online health assessment and operational decision making of key components for Spacecraft Power Supplies.
M. Fabrega - One of the best experts on this subject based on the ideXlab platform.
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Soft switching techniques to improve the performances of standard DC-DC converter modules
1998Co-Authors: M. Fabrega, L. GarraudAbstract:In the Spacecraft Power Supplies field, driven by the increasing integration of the equipments (ASIC's...), the hard trend is to reduce mass and volume of these functions. These requirements lead so to use, more and more, integrated standard DC-DC converters modules to built the Power cell of the new Power Supplies. This paper summarizes the main results of the work performed in the frame of a CNES R/D contract concerning a 50 W module for new payload applications. It presents the significant technical improvements with soft switching techniques allowing to increase the switching frequency with keeping good efficiency and technological improvements with high integration. A DC-DC converters module (± 3.3 V, ± 12 V ; 50 W) preliminary definition and main performances with such innovative solutions are presented.