Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011最新文献_第8页

ATB - An AOCS test bed simulation framework AOCS试验台仿真框架

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966881

O. Kalden, M. Irvine

引用次数: 1

Free vibration analysis of rotating thin-walled composite beams 旋转薄壁组合梁的自由振动分析

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966860

S. Durmaz, O. Ozdemir Ozgumus, M. O. Kaya

引用次数: 2

Design and navigation control of an advanced level CANSAT 一种先进水平的卫星导航卫星的设计与导航控制

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966942

M. Celebi, Serdar Ay, Mohammed Khalil Ibrahim, M. Aydemir, M. Bensaada, Lewis Hennedige Jayathu Dimuthu Kumara Fernando, H. Akiyama, Shusaku Yamaura

{"title":"Design and navigation control of an advanced level CANSAT","authors":"M. Celebi, Serdar Ay, Mohammed Khalil Ibrahim, M. Aydemir, M. Bensaada, Lewis Hennedige Jayathu Dimuthu Kumara Fernando, H. Akiyama, Shusaku Yamaura","doi":"10.1109/RAST.2011.5966942","DOIUrl":"https://doi.org/10.1109/RAST.2011.5966942","url":null,"abstract":"This paper presents design and navigation control of an advanced level comeback CanSat which is going to be launched to an altitude of about 400 m using an amateur rocket from ground level. The CanSat uses advanced and ultra-light microcontroller, pressure and temperature sensors, 3-axis accelerometer, 3-axis gyro, camera, GPS, IR distance measuring sensor, and RF communication module to communicate with the ground station PC. Three actuators are considered in this work for flight and ground segments control. They are the motor driven propeller, elevator and rudder. For the flight segment, parachute and attitude control are used to control the CanSat descent rate, attitude and heading. For the ground segment control; both the propeller and the rear landing gear of the CanSat is used for heading toward a predefined location on the ground. The rear landing gear is connected to the rudder rotational axis. An indigenous navigation control and electronic circuit design with the test results also are presented in this paper.","PeriodicalId":285002,"journal":{"name":"Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131908844","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: 14

GeoEtrim: Geospatial evaluation and training of images geoetrm:图像的地理空间评价和训练

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966809

H. Topan

引用次数: 5

Chlorophyll fluorescence of nitrogen fixing soybean plants (Glycine max L.) under stress conditions 胁迫条件下固氮大豆植株(Glycine max L.)的叶绿素荧光

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966818

D. Krezhova, I. Iliev, E. Kirova

{"title":"Chlorophyll fluorescence of nitrogen fixing soybean plants (Glycine max L.) under stress conditions","authors":"D. Krezhova, I. Iliev, E. Kirova","doi":"10.1109/RAST.2011.5966818","DOIUrl":"https://doi.org/10.1109/RAST.2011.5966818","url":null,"abstract":"Chlorophyll fluorescence technique was applied on young nitrogen fixing soybean plants (Glycine max L.) for detecting and assessment of the effects of two environmental stress factors - salinity and enhanced UV-B radiation. Biological nitrogen fixation by legume - Rhizobium symbiosis is important to agricultural productivity and is therefore of great economic interest. Soybean and soy foods attract worldwide attention for their potential health benefits and uses in food manufacturing. Soybean plants were grown under controlled conditions as water cultures on Helrigel nutrient solution. Three days seedlings were inoculated with suspension of Bradyrhizobium japonicum strain 273. Salinity was performed at the stage of 2nd – 4th trifoliate expanded leaves by adding of NaCl in the nutrient solution in concentrations 40 mM and 80 mM. On the 14th day after the salinity treatment the half of the plants was treated with UV-B radiation at intensity of 64.4 µmol m−2 s−1 for four hours. Measurements were conducted on the same day. Hyperspectral fluorescence data were collected by a portable fiber-optic spectrometer in the visible and near infrared spectral ranges (600–900 nm). The spectral and statistical analysis was performed on fluorescence spectra normalized against the second maximum at five characteristic wavelengths. The statistical significance of the differences at p<0.05 between data means of the control and treated plants were ascertained by the Student's t-criterion. In the case of only salinity treatment the differences were statistically significant for both NaCl concentrations at all wavelengths with the exception of the rear slope. For the combined treatment (salinity + UV-B radiation) the differences in the spectra are non-significant at two of the wavelengths (in the middle of forefront and rear slope).","PeriodicalId":285002,"journal":{"name":"Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133972875","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: 1

Mission analysis and planning of a CANSAT CANSAT任务分析和规划

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966951

Cihan Cabuloglu, Huseyin Aykis, Resul Yapacak, E. Çaliskan, Omer Agirbas, Saban Abur, Suleyman Soyer, H. Turkmen, Serdar Ay, Yasin Karatas, Emre Aydemir, M. Celebi

引用次数: 6

ISAR autofocusing image reconstruction of sea target 海面目标ISAR自动调焦图像重建

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966862

A. Lazarov, T. Kostadinov

{"title":"ISAR autofocusing image reconstruction of sea target","authors":"A. Lazarov, T. Kostadinov","doi":"10.1109/RAST.2011.5966862","DOIUrl":"https://doi.org/10.1109/RAST.2011.5966862","url":null,"abstract":"This work deals with the implementation of ISAR method to extract an image of a sea target with high resolution. Three dimensional ISAR scenario, including radar and a target of interest, is depicted in one and the same 3-D Cartesian coordinate system and duly considered. The sea target is presented as an assembly of discrete point scatteres which intensities are interpreted as an image function of the object observed. Analytical geometrical expressions to define a range distance from the radar to each point scatterer from the object space are derived. In order to realize high range resolution on the line of sight an informative linear frequency modulated waveform is applied. An ISAR signal model as a superposition of signals reflected from target's point scatterers is described and graphicaly illustrated. Image extraction from ISAR signal returns is performed by implementation of Fourier transformation on both range and cross-range coordinates. Image enhancement is accomplished by iterative polynomial focusing procedure and entropy as a cost function. In order to verify the supposed algorithm a numerical experiment is performed.","PeriodicalId":285002,"journal":{"name":"Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126923414","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

Extension and flapwise bending vibration analysis of a rotating piezolaminated composite Timoshenko beam 旋转压电层合复合材料Timoshenko梁的伸缩及颤振振动分析

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966830

O. Ozdemir Ozgumus, M. O. Kaya

引用次数: 0

On the NDP onset in pre-ignition transient of high performance SRMs: VEGA Z9A experience 高性能srm预点火瞬态NDP开始:VEGA Z9A经验

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966934

B. Favini, E. Cavallini, G. Rossi, M. Di Giacinto, A. Di Mascio, F. Serraglia

引用次数: 8

Nonlinear control of space vehicles with multi-mass fuel slosh dynamics 空间飞行器多质量燃料晃动动力学非线性控制

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 Pub Date : 2011-06-09 DOI: 10.1109/RAST.2011.5966834

M. Reyhanoglu, J. Hervas

引用次数: 24