2014 IEEE Metrology for Aerospace (MetroAeroSpace)最新文献

{"title":"Dual-field-of-view star sensors utilizing optical tagging approach by grating","authors":"Shaobo Gao, Shijian Lin, Ji-chun Tan, Haibo Liu, Xiaofeng Wang, Yunjin Chen","doi":"10.1109/METROAEROSPACE.2014.6865917","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865917","url":null,"abstract":"Star sensors play an important role in spacecraft attitude determination. It is common for the roll accuracy of a traditional star sensor with single field of view to be significantly worse than the cross-axis accuracy. Many satellites utilize two/three onboard star cameras for their attitude determination in x, y, z 3-axis. The dual-field-of-view star sensor has been proposed, which can image stars from two orthogonal directions on the same CCD simultaneously. This paper focuses on the critical issue of tagging the star spots from one of the fields of view so that these stars can be recognized. Star light from one direction is modulated by an optical grating in order to tag star images from this viewing field and distinguish them from the star images from another direction. Diffraction splits by phase gratings and amplitude gratings are compared in feasibility and complexity by numerical simulations.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131646098","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}

{"title":"Architectures and algorithms for non-cooperative sense and avoid","authors":"Anna Elena Tirri, G. Fasano, D. Accardo, A. Moccia","doi":"10.1109/METROAEROSPACE.2014.6865907","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865907","url":null,"abstract":"The paper focuses on research results relevant to non-cooperative sense and avoid based on different sensing architectures and algorithms. In particular, first a radar/electro-optical system is presented where real time data fusion is based on a central level scheme and an Extended Kalman Filter. It was validated in flight tests carried out in the framework of TECVOL project carried out by the Italian Aerospace Research Centre (CIRA) and the University of Naples “Federico II”. In order to evaluate the impact of innovative technologies on system performance, solutions based on Particle Filtering are then introduced which have been developed and implemented in radar-only framework for off-line simulations, taking advantage from sensor data gathered in flight. Finally, algorithms relevant to vision-based sense and avoid are briefly presented, and preliminary results based on flight images in near collision scenarios are discussed.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121672463","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}

{"title":"Data handling equipment for payload sub-systems","authors":"M. Marchetti, L. Marrocchi, Massimo Spadoni, Francesco Costa, V. Vinti, S. Debei, A. Aboudan, F. Esposito","doi":"10.1109/METROAEROSPACE.2014.6865968","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865968","url":null,"abstract":"In the frame of EXOMARS 2016 Mission, TEMIS and Centro Interdipartimentale di Studi e Attività Spaziali G. Colombo (CISAS) have developed a very modular sub-system, named Central Electronic Unit (CEU), that has the main objective of handle, acquire and transmit medium and low rate data, coming from sensors devoted to investigate the Martian atmosphere. Thanks to the high modularity of the architecture, CEU is very easy to customize in order to be used in different missions as data handling platform to interface with several types of equipments or intrumentations.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125294004","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}

{"title":"SDR GNSS receivers: A comparative overview of different approaches","authors":"R. Falone, C. Stallo, E. Gambi, S. Spinsante","doi":"10.1109/METROAEROSPACE.2014.6865943","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865943","url":null,"abstract":"Co-existence of different constellations for Global Navigation Satellite Systems (GNSS) provides new opportunities to improve the services offered to the users, but also poses new challenges and increased complexity in receiver design. To ensure flexibility and dynamic re-configuration, Software Defined Radio (SDR) receivers seem to be the natural solution, both for the research and industrial communities. This paper wants to provide an overview of the solutions proposed until now, trying to highlight what the trend is in SDR GNSS receiver development, and to what extent currently proposed SDR approaches are able to replace traditional hardware-based design.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124216760","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}

{"title":"A first study on prognostic system for electric engines based on Envelope Analysis","authors":"M. Caciotta, Valerio Cerqua, F. Leccese, S. Giarnetti, E. De Francesco, Eduardo De Francesco, Nicola Scaldarella","doi":"10.1109/METROAEROSPACE.2014.6865950","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865950","url":null,"abstract":"A measurement system able to extract the envelop of signals coming from electrical motors has been presented. The system use a tri-axial accelerometer mounted on an electrical motor used on small Unmanned Aerial Vehicles to made a vibrational analysis. The aim of this paper is to show the first part of this system based on the Envelope Analysis that, with the support of a database and a comparison algorithm, will facilitate the identification of possible failures. A first analysis of the required algorithms based on the Envelope Analysis is presented together with a test bench which allows the analysis of different types of electric motors. A series of tests are also presented.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131198726","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}

{"title":"Cost effective emulation of geostationary satellite channels by means of software-defined radio","authors":"H. Bui, L. Franck","doi":"10.1109/METROAEROSPACE.2014.6865984","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865984","url":null,"abstract":"This contribution is about the use of software-defined radio (SDR) for channel emulation. Based on NI USRP devices and the LabVIEW programming environment, we devised an affordable RF channel emulator for geostationary satellite transmission. It is able to process 2 × 1.6 MBaud in realtime while adding thermal noise, phase noise and propagation delay according to the system which is modelled. This extensible tool is valuable for supporting teaching activities and it also serves as a convenient test bench when devising new protocols and services that are meant to run over satellite links.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114453848","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}

{"title":"Position and orientation measurement of a fast moving multibody system in ground tests","authors":"M. Pertile, M. Zaccariotto, C. Bettanini, S. Debei","doi":"10.1109/METROAEROSPACE.2014.6865966","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865966","url":null,"abstract":"A vision based method for position and orientation measurement of a multi body system is described. The measurement procedure comprises a combination of modern image analysis techniques such as Inverse Perspective Mapping, Normalized Cross Correlation, and Kalman filter tracking of multiple markers. The described approach is applied to measure the rapid motion of a complex system such as a deployable antenna for space applications and can easily be employed for other applications. A key feature of the described work is a detailed analysis of the main uncertainty sources and of their effects on the measurement results.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114640958","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}

{"title":"Comparison of visual odometry systems suitable for planetary exploration","authors":"M. Pertile, S. Chiodini, S. Debei","doi":"10.1109/METROAEROSPACE.2014.6865926","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865926","url":null,"abstract":"In planetary exploration space missions, motion measurement of a vehicle on the surface of a planet is a very important task. The main contribution of this work is an experimental comparison among visual odometry systems using lenses with three different focal lengths (an ultra wide angle, a medium wide angle and a telephoto lens). The comparison is performed with a rigorous uncertainty analysis. The stereo camera is mounted on a laboratory vehicle which is driven along a closed path and the experimentally obtained uncertainties are compared, pointing out strengths and weaknesses of employing wide angle or telephoto lenses for motion measurement.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133194445","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}

{"title":"In-line high sensitivity tapered-fiber Mach-Zehnder interferometer for aerospace sensing applications","authors":"N. Chen, Jheng-Jyun Wang, W. Cheng","doi":"10.1109/METROAEROSPACE.2014.6865996","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865996","url":null,"abstract":"We demonstrate the optical measurements of vibration, inclination, torsion, wind pressure and speed based on a micro abrupt-tapered Mach-Zehnder interferometer. This interferometer has two abrupt tapers in the Er/Yb codoped fiber and thus fractional amount of core mode is converted into cladding modes at the first abrupt taper. The core and cladding modes propagate through different optical paths and meet again at the second abrupt taper to produce interferences for aerospace sensing applications.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134055154","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}

{"title":"High-accuracy eddy current measurements of metals","authors":"O. Martens, R. Land, M. Rist, A. Pokatilov","doi":"10.1109/METROAEROSPACE.2014.6865912","DOIUrl":"https://doi.org/10.1109/METROAEROSPACE.2014.6865912","url":null,"abstract":"Eddy current measurements are widely used for non-destructive testing and identification of the electrically conductive materials (e.g. metals and alloys) and structures of such materials, also in aerospace industries. As well, new application fields are interesting, like monitoring of the composites, including electrically conductive carbon-fibres inside the structures. One challenge is the precise ”absolute” (”calibration-free”) measurement of the electrical and/or magnetic properties of the materials and their geometry, without using of the reference calibration pieces with known electromagnetic properties. Excluding of such calibrated and certified reference metal pieces from the metrology chain makes the measurements more accurate, covers wider frequency range, makes measurements faster and cheaper. The instrumentation and measurement approaches, models, simulations and algorithms for such measurements are explained, on practical examples, of precise measurement of electromagnetic properties of metals. For non-magnetic materials the electrical conductivity (inverse of the resistivity) can be measured with accuracy of better than 1 %, in the kHz or even MHz range. The measurement of the magnetic (e.g. ferrous) materials is more sophisticated and challenging. The additional problem to be solved is separating of the influence of the magnetic permeability and electrical conductivity of the material under test onto the eddy current measurement results. The solution is to estimate the magnetic permeability of the material by low-frequency measurements (in the 10 Hz or even lower range), but such measurements are very demanding for the needed resolution and accuracy of the used instrumentation. Currently the achievable accuracy of the magnetic permeability and electrical conductivity measurement could be estimated at the 10 % level. One problem to be considered is the frequency dependency of the magnetic permeability of the ferrous materials. Also, interesting future challenge is precise reconstructing of the geometry of the specimens under test, by using of the reverse eddy current models.","PeriodicalId":162403,"journal":{"name":"2014 IEEE Metrology for Aerospace (MetroAeroSpace)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131285165","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}