2010 IEEE Aerospace Conference最新文献_第9页

Distributed prognostic health management with gaussian process regression 高斯过程回归的分布式预后健康管理

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446841

S. Saha, B. Saha, A. Saxena, K. Goebel

引用次数: 56

An efficient fault-tolerance technique for the Keyed-Hash Message Authentication Code 密钥哈希消息认证码的高效容错技术

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446669

M. Juliato, C. Gebotys

{"title":"An efficient fault-tolerance technique for the Keyed-Hash Message Authentication Code","authors":"M. Juliato, C. Gebotys","doi":"10.1109/AERO.2010.5446669","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446669","url":null,"abstract":"The growing demand for secure communications has lead to the utilization of cryptographic mechanisms on-board spacecrafts. However, that it not a trivial task due to sensitivity of cryptographic primitives to bit-flips, which are commonly caused by the radiation found in space. On-board processing has mitigated single event upsets (SEUs) by employing the traditional triple modular redundancy (TMR), but that technique incurs into huge area and energy penalties. This paper introduces an efficient approach to achieve fault tolerance in data origin authentication mechanisms based on the Keyed-Hash Message Authentication Code (HMAC). The proposed scheme achieves very high resistance against SEUs while reducing implementation area requirements and energy consumption compared to TMR. Results obtained through FPGA implementation show that HMAC-SHA512 utilizes 53% less area and consumes 25% less energy compared to the traditional TMR technique. Furthermore, the memory and registers of this hardware module are respectively 386 and 1140 times more resistant against SEUs than TMR. These results are crucial for substituting TMR with more efficient strategies therefore contributing to the achievement of higher levels of security in space systems.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121494521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Real-time trajectory generation: Improving the optimality and speed of an inverse dynamics method 实时轨迹生成:提高逆动力学方法的最优性和速度

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446779

R. Drury, A. Tsourdos, A. Cooke

引用次数: 5

Rugged compact metallized capillary Raman probe for material identification in hostile environments 坚固紧凑的金属化毛细管拉曼探针，用于恶劣环境下的材料识别

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446979

B. Bortnik, J. P. Kirby, J. Lambert

引用次数: 1

Performance of the joint reduced rank model-based demodulator for asynchronous co-channel GMSK signals 基于联合降阶模型的异步同信道GMSK信号解调性能研究

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446919

S. Sud, Edward B. Page

{"title":"Performance of the joint reduced rank model-based demodulator for asynchronous co-channel GMSK signals","authors":"S. Sud, Edward B. Page","doi":"10.1109/AERO.2010.5446919","DOIUrl":"https://doi.org/10.1109/AERO.2010.5446919","url":null,"abstract":"Cellular communications systems suffer from co-channel interference (CCI), due to signals from adjacent cells interfering with each other. Conventional demodulation techniques have relied on interference rejection to extract only the highest power signal. Recently, a joint reduced rank model-based demodulator (J-RRMBD) was presented that extracts two or more co-channel signals using continuous phase modulation (CPM) simultaneously. The technique is based upon a root selection algorithm using forward-backward linear prediction (FBLP), whereby multiple unequal powered signals are extracted by choosing the highest powered roots. Using synchronous continuous phase frequency shift keying (CPFSK) signals, the algorithm has been shown to provide up to 5 dB improvement over the conventional quadrature demodulator (QD) and single user model-based demodulator (MBD), which extracts only the highest powered user. In this paper, we apply the technique to received asynchronous Gaussian Minimum Shift Keying (GMSK) signals with unknown frequency offsets, encountered in terrestrial GSM networks. We compare performance to a joint Viterbi demodulator when two co-channel signals are present and show that the new technique provides an order of magnitude reduction in bit error rate (BER), and can more reliably demodulate signals with few samples as long as the carrier-to-interference ratio (CIR) ≥ 3 dB. When CIR ≪ 5 dB, a single user version of the algorithm provides performance improvement up to 7 dB over the Viterbi algorithm.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131369127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The NASA In-Space Propulsion Technology project's current products and future directions NASA太空推进技术项目的当前产品和未来方向

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446768

David J. Anderson, J. Dankanich, M. Munk, E. Pencil, L. Liou

引用次数: 11

Design and analysis of the International X-Ray Observatory mirror modules 国际x射线天文台镜面模块的设计与分析

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1117/12.857535

R. Mcclelland, T. Carnahan

{"title":"Design and analysis of the International X-Ray Observatory mirror modules","authors":"R. Mcclelland, T. Carnahan","doi":"10.1117/12.857535","DOIUrl":"https://doi.org/10.1117/12.857535","url":null,"abstract":"The Soft X-Ray Telescope (SXT) modules are the fundamental focusing assemblies on NASA's next major X-ray telescope mission, the International X-Ray Observatory (IXO). {su12]The preliminary design and analysis of these assemblies has been completed, addressing the major engineering challenges and leading to an understanding of the factors effecting module performance. Each of the 60 modules in the Flight Mirror Assembly (FMA) supports 200–300 densely packed 0.4 mm thick glass mirror segments in order to meet the unprecedented effective area required to achieve the scientific objectives of the mission. Detailed Finite Element Analysis (FEA), materials testing, and environmental testing have been completed to ensure the modules can be successfully launched. Resulting stress margins are positive based on detailed FEA, a large factor of safety, and a design strength determined by robust characterization of the glass properties. FEA correlates well with the results of the successful modal, vibration, and acoustic environmental tests. Deformation of the module due to on-orbit thermal conditions is also a major design driver. A preliminary thermal control system has been designed and the sensitivity of module optical performance to various thermal loads has been determined using optomechanical analysis methods developed for this unique assembly. This design and analysis furthers the goal of building a module that demonstrates the ability to meet IXO requirements, which is the current focus of IXO FMA technology development team.","PeriodicalId":378029,"journal":{"name":"2010 IEEE Aerospace Conference","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128021923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Assessing the capacity of a federated ground station 评估联邦地面站的能力

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446950

Sara C. Spangelo, D. Boone, J. Cutler

引用次数: 12

Model-based radiometric restoration 基于模型的辐射恢复

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446707

Russel P. Kauffman, P. North, P. M. Fuller

引用次数: 0

A coupled factorial hidden Markov model (CFHMM) for diagnosing coupled faults 一种用于耦合故障诊断的耦合因子隐马尔可夫模型

2010 IEEE Aerospace Conference Pub Date : 2010-03-06 DOI: 10.1109/AERO.2010.5446826

A. Kodali, K. Pattipati, Satnam Singh

引用次数: 4