2017 8th International Conference on Recent Advances in Space Technologies (RAST)最新文献_第5页

Attitude determination of nanosatellites in the sun-eclipse phases 日蚀阶段纳米卫星的姿态测定

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002990

C. Hajiyev, Demet Cilden‐Guler, Y. Somov

引用次数: 2

Automatic arrival time detection for earthquakes based on fuzzy possibilistic C-Means clustering algorithm 基于模糊可能性c均值聚类算法的地震自动到达时间检测

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003001

O. Saad, A. Shalaby, M. Sayed

{"title":"Automatic arrival time detection for earthquakes based on fuzzy possibilistic C-Means clustering algorithm","authors":"O. Saad, A. Shalaby, M. Sayed","doi":"10.1109/RAST.2017.8003001","DOIUrl":"https://doi.org/10.1109/RAST.2017.8003001","url":null,"abstract":"Earthquake Early Warning System (EEWS) has a great impact on reducing the harm effects resulting from earthquakes such as human death, nuclear leakage, contamination of water, and properties damage. In this paper, we proposed a new approach to detect the arrival time of the earthquakes which is the main module in the EEWS. The proposed algorithm based on Fuzzy Possibilistic C-Means (FPCM) clustering algorithm. FPCM divide the signal into two groups, seismic noise, and seismic signal. The degrees of membership computed, and a Dual-thresholds system applied as a basis for classification to detect the arrival time accurately. The proposed algorithm has high accuracy on picking the arrival time of the earthquake. It achieved arrival time picking accuracy of 90.7 % with a standard deviation of 0.105 seconds for 407 field seismic waveforms. Also, the results show that the proposed algorithm can detect the arrival time for micro-earthquakes accurately despite the existence of low Signal to Noise ratio (SNR). The proposed algorithm can deal with the seismic signal with SNR as low as −10 dB.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130055328","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: 5

3D multi-pendulum model of slosh dynamics in a spacecraft 航天器晃动动力学的三维多摆摆模型

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002985

M. Navabi, A. Davoodi

引用次数: 12

Mathematical model for small launcher, performances evaluation 小型发射装置数学模型，性能评价

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002993

Teodor-Viorel Chelaru, S. Pana, Adrian Chelaru

引用次数: 0

Launch vehicle selection for a geostationary communication satellite using data envelopment analysis 基于数据包络分析的地球同步通信卫星运载火箭选择

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002992

T. Teti̇k, G. Das

引用次数: 2

Magnetometer only attitude estimation for spinning small satellites 旋转小卫星的磁强计姿态估计

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002996

Halil Ersin Söken, S. Sakai

引用次数: 1

High altitude smart monitoring system integration by using a helium powered mechanical balloon 高空智能监测系统集成采用氦气动力机械气球

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003016

E. Aribas, Evren Daglarli

引用次数: 0

Lossless compression of ultraspectral sounder data using recursive least squares 利用递归最小二乘对超声波测深数据进行无损压缩

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002966

Ali Can Karaca, M. Güllü

引用次数: 4

Robust design studies for vibration and shock isolation of sensitive electronic equipments 敏感电子设备的振动和冲击隔离稳健设计研究

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002961

B. Kuran, B. Karaman

{"title":"Robust design studies for vibration and shock isolation of sensitive electronic equipments","authors":"B. Kuran, B. Karaman","doi":"10.1109/RAST.2017.8002961","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002961","url":null,"abstract":"Robust design methodology is concerned with the process and the product design while minimizing the effects of uncertainties in design and external noises. In robust design, optimum system design is sought with special emphasis on the insensitiveness of objective functions due to uncertainties. This study focuses on the robust design studies of vibration and shock isolation of sensitive electronic equipment. The performance of three types of isolators due to vibration and shock loading is analyzed. The methodology is based on minimizing the Root Mean Square (RMS) of the linear and angular vibrations and the Square Root of Sum of Squares (SRSS) of shock response. The variations for the inertial properties of the equipment, the material properties of viscoelastic isolators and the isolator locations with respect to the equipment mass center are considered as the noise variables. The electronic equipment to be isolated are modeled as a rigid body having 6 degrees of freedom. Signal to Noise (S/N) ratios of the linear acceleration and the angular velocity responses due to vibration loading, along with the (S/N) ratios of the linear acceleration and linear displacement responses due to shock loading are defined. The first order tolerance analysis is also performed to assess the sensitivities of responses to noise variables to determine the key variables for which the variations are to be reduced.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123320970","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

Attitude guidance, navigation and robust control of an agile land-survey satellite 敏捷陆地测量卫星的姿态制导、导航和鲁棒控制

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003017

Y. Somov, S. Butyrin, S. Somov

引用次数: 2