2012 IEEE Aerospace Conference最新文献_第10页

Simulation to support local search in trajectory optimization planning 仿真支持轨迹优化规划中的局部搜索

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187438

R. Morris, K. Venable, J. Lindsey

引用次数: 5

The Astro-H soft X-ray mirror Astro-H软x射线镜

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187155

David Robinson, T. Okajima, P. Serlemitsos, Y. Soong

引用次数: 0

Parallelization techniques for the 2D Fourier Matched Filtering and Interpolation SAR algorithm 二维傅里叶匹配滤波和插值SAR算法的并行化技术

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187225

F. Kraja, G. Acher, A. Bode

{"title":"Parallelization techniques for the 2D Fourier Matched Filtering and Interpolation SAR algorithm","authors":"F. Kraja, G. Acher, A. Bode","doi":"10.1109/AERO.2012.6187225","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187225","url":null,"abstract":"Future space application will require High Performance Computing (HPC) capabilities to be available on board of future spacecrafts. To cope with this requirement, multi and many-core processor technologies have to be integrated in the computing platforms of the spacecraft. One of the most important requirements, coming from the nature of space applications, is the efficiency in terms of performance per Watt. In order to improve the efficiency of such systems, algorithms and applications have to be optimized and scaled to the number of cores available in the computing platform. In this paper we describe the parallelization techniques applied to a Synthetic Aperture Radar (SAR) application based on the 2-Dimentional Fourier Matched Filtering and Interpolation (2DFMFI) Algorithm. Other than sequential optimizations, we applied parallelization techniques for shared memory, distributed shared memory and distributed memory environments, using parallel programming models like OpenMP and MPI. It turns out that parallelizing this type of algorithms is not an easy and straightforward task to do, but with a little bit of effort, one can improve performance and scalability, increasing the level of efficiency.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":"85 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91363899","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: 3

A fast model-based diagnosis engine 基于模型的快速诊断引擎

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187367

A. Fijany, A. Barrett, F. Vatan

引用次数: 0

Advances in multi-mission autonomous rendezvous and docking and relative navigation capabilities 多任务自主交会对接及相关导航能力研究进展

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187303

K. Miller, J. Masciarelli, R. Rohrschneider

{"title":"Advances in multi-mission autonomous rendezvous and docking and relative navigation capabilities","authors":"K. Miller, J. Masciarelli, R. Rohrschneider","doi":"10.1109/AERO.2012.6187303","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187303","url":null,"abstract":"Relative Navigation (RelNav) applications, have been identified as an enabling function of many of NASA's future mission architectures, including Rendezvous, Proximity Operations and Docking (RPOD), as well as planetary surface rendezvous and landing, surface mobility and in space servicing. Functional capabilities have been maintained and exercised for decades, but recent design and test efforts have validated revolutionary improvements in functionality and performance levels of active and passive relative navigation sensors and processing, providing a pathway for advanced autonomous operations The advances are multidisciplinary and include compact, multimission algorithm design, high performance camera technology, flash LIDAR advances, spatial light modulation and systems engineering. Many of the key technologies have been demonstrated in airborne test programs, and some of the key flash LIDAR advances were flight qualified on the Sensor Test for Orion RelNav Risk Mitigation (STORRM) relative navigation sensor suite, flown in 2011 on STS-134. The STORRM sensor suite has been developed to provide a highly reliable, compact, lightweight solution for human and robotic missions. This paper provides progress and performance results associated with relative navigation via STORRM, as well as other RelNav technology advancement and relevance to future mission applications. Cooperative and noncooperative mission application environments with natural and manmade targets and feature sets and varying degrees of autonomy are addressed.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":"77 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90628580","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: 6

A multiple asset scheduler for satellite data throughput and variable rate analysis 用于卫星数据吞吐量和可变速率分析的多资产调度程序

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187123

G. Bussey, W. Horne

引用次数: 1

Analysis of spectrometric data of aeroengines to establish hazard threshold limits for Iron content 航空发动机光谱数据分析建立铁含量危险阈值限值

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187361

A. Hassan, I. Manarvi

{"title":"Analysis of spectrometric data of aeroengines to establish hazard threshold limits for Iron content","authors":"A. Hassan, I. Manarvi","doi":"10.1109/AERO.2012.6187361","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187361","url":null,"abstract":"As aero-engines operate, metal and other material particles are removed from the contact surfaces and are carried away in the flow of lubricating oil. Spectrometric Oil Analysis Program (SOAP) is a powerful tool for elemental analysis of structural metals in the lubricating oils circulating inside the machine, and is suitable for determining wear metal quantity, elemental composition, rate of wear and its source. The oil samples from the aero-engines are analyzed through spectrometry and the readings are assessed against pre-defined values to ascertain the physical health of the engines. This method is employed to continuously monitor the condition of the engine internal parts without any stripping, thus reducing maintenance time and costs. The predefined values or limits for SOAP are defined by the Original Equipment Manufacturer and are normally formalized during design process of the equipment. For the Chinese range engines powering the fighter jet aircraft, the limits for SOAP are not defined and thus this valuable technique cannot be fully applied to these engines. As a consequence the benefits of continuous condition monitoring together with reduced maintenance cost and time are not fully accrued. Iron (Fe) is the major element of the engine internal parts and its inclusion in oil sample gives a clear picture of the wear and tear of the engine internal parts. In order to accrue benefits of SOAP on Chinese range aero-engines there is a need to define the alert and hazard thresholds limits for SOAP on these engines. Once defined, the SOAP data can be used to decide about the continued operation of the engine or its induction for maintenance. In this paper the SOAP data for Chinese range engines operating in the fighter aircraft is collected and then it is statistically analysed to establish the limits for alerts and hazard for Iron (Fe).","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":"28 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72736387","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: 0

Microgravity coring: A self-contained anchor and drill for consolidated rock 微重力取心:用于固结岩石的独立锚和钻机

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187052

A. Parness, M. Frost

{"title":"Microgravity coring: A self-contained anchor and drill for consolidated rock","authors":"A. Parness, M. Frost","doi":"10.1109/AERO.2012.6187052","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187052","url":null,"abstract":"The Microspine Drill, a self-contained anchor and rotary percussive drill, is presented. The Microspine Drill can core in an inverted orientation into consolidated rock, a harder-than-zero-g proof of concept. The anchor extends the use of mi-crospines to microgravity environments. Microspines, originally developed for climbing robots, use arrays of hooks with passive suspension structures to opportunistically grasp rough surfaces and share loads across many contacts. Utilizing radial arrays and hierarchical compliance, this new system creates omnidirectional anchors. Prototypes have demonstrated anchoring strengths of >;155 N tangent to, >;150 N at 45° to, and >;180 N normal to the rock surface. Using a weight-on-bit of ~60N, 20 mm diameter boreholes were drilled 83 mm deep into vesicular basalt and a'a samples while retaining 12 mm diameter cores. The anchor-drill combination can be used to acquire samples and set up rope networks during future manned missions to near earth objects. The instrument also enables gravity independent sample acquisition from rock surfaces for science missions to asteroids, comets, or the walls and ceilings of lava tubes, craters, caves, and other extreme planetary terrains.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":"41 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77331766","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: 16

Innovative astronaut navigation system based on smart integrated sensors 基于智能集成传感器的创新型航天员导航系统

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187112

H. Benzerrouk, A. Nebylov, G. Yatsevitch

引用次数: 0

A decision fusion approach for clustering of hyperspectral data using spectral unmixing methods 基于光谱分解方法的高光谱数据聚类决策融合方法

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187197

H. Gholizadeh, M. J. V. Zoej, B. Mojaradi

{"title":"A decision fusion approach for clustering of hyperspectral data using spectral unmixing methods","authors":"H. Gholizadeh, M. J. V. Zoej, B. Mojaradi","doi":"10.1109/AERO.2012.6187197","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187197","url":null,"abstract":"This paper aims at a decision fusion approach for combining three spectral unmixing methods to cluster hyperspectral data. Unlike standard image clustering techniques, analyzing hyperspectral data on a pure pixel basis may not be a true assumption. Meanwhile, multiple classifier systems often show better performance than each of the constituent classifiers. This is due to the fact that each classifier makes errors on different regions of the input space. With these facts in mind, this paper distills these two approaches into a single approach and exploits the advantages of both spectral unmixing algorithms and decision fusion methods. In this paper, three unmixing methods namely, Fully Constrained Least Squares (FCLS), Nonnegatively Constrained Least Squares (NCLS) and Sum-to-one Constrained Least Squares (SCLS) are employed as the ensemble classifiers and their results are combined at two different fusion levels: the abstract level and the measurement level. Experimental results on a real-world hyperspectral data proved that the proposed approach shows better clustering results compared to those of K-Means and Fuzzy c-Means in terms of the Adjusted Random Index (ARI) measure.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":"11 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76420082","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: 3