2017 8th International Conference on Recent Advances in Space Technologies (RAST)最新文献_第4页

Design and manufactering of an X-band horn antenna using 3-D printing technology 利用3d打印技术设计和制造x波段喇叭天线

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002988

Yunus Can Toy, P. Mahouti, F. Güneş, M. A. Belen

引用次数: 22

Ant colony optimization approach for satellite broadcast scheduling problem 卫星广播调度问题的蚁群优化方法

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002936

S. Kilic, O. Ozkan

{"title":"Ant colony optimization approach for satellite broadcast scheduling problem","authors":"S. Kilic, O. Ozkan","doi":"10.1109/RAST.2017.8002936","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002936","url":null,"abstract":"This paper handles an optimization problem related to Low Earth Orbit (LEO) artificial satellites which can have a range of missions, including scientific research, weather observation, military support, navigation, Earth imaging, and communications. A LEO is simplest and cheapest for satellite placement and it has the potential advantages of high bandwidth, low communication time lag, reduced power requirement and antennas and high-resolution images. Besides these advantages, there exists a challenge for operating satellites in LEO because they are not visible from a given point of Earth at all times. So, a large number of satellites are needed if the mission requires uninterrupted connectivity. It is also possible to offer discontinuous coverage using an LEO satellite capable of storing data received while passing over one part of Earth and transmitting it later while passing over another part. A LEO satellite system consists of a set of satellites and a set of ground terminals. A problem that should be solved for the operators is to find a valid broadcasting pattern between satellites and ground stations which satisfies some technical constraints and maximizes a profit function. This problem was defined as Satellite Broadcast's Scheduling (SBS) problem in the related literature and it is known to be an NP-complete problem. Nevertheless being a problem firstly published almost 50 years ago, the number of published studies on the problem is limited and the proposed solution approaches have been mainly based on neural networks and metaheuristics. This paper proposes an ant colony optimization metaheuristic approach for the SBS problem. The proposed approach is compared with previous works using benchmark problems reported in the literature. Results are evaluated to be promising.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"91 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":"122661564","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: 10

Cross polarization monopulse jammer located on UAV 无人机交叉偏振单脉冲干扰机

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002943

İmren Kalinbacak, M. Pehlivan, K. Yeğin

引用次数: 3

Pretest setup installation of the METU-DBL project to perform space radiation tests METU-DBL项目的预测试安装，以进行空间辐射测试

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002927

M. B. Demirkoz, I. Efthymiopoulos, A. Gencer, A. Milanese, Merve Yiǧitoǧlu, I. Sahin, Gamze Kilicerkan Baslar, M. S. Aydın, A. Avaroglu, P. Uslu, Selcen Uzun Duranz, D. Veske, R. Uzel, B. Bodur

{"title":"Pretest setup installation of the METU-DBL project to perform space radiation tests","authors":"M. B. Demirkoz, I. Efthymiopoulos, A. Gencer, A. Milanese, Merve Yiǧitoǧlu, I. Sahin, Gamze Kilicerkan Baslar, M. S. Aydın, A. Avaroglu, P. Uslu, Selcen Uzun Duranz, D. Veske, R. Uzel, B. Bodur","doi":"10.1109/RAST.2017.8002927","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002927","url":null,"abstract":"Satellites and spacecrafts are exposed to space radiation environment during their mission. This environment consists of cosmic rays, solar particles and trapped particles. Cosmic rays are coming from the outside of our solar system. Solar particles are produced by the Sun. These particles can be trapped around the Earth's magnetic field lines when they approach the Earth's atmosphere. These particles can affect performance and robustness of electronic components or materials used in space and such effects can be classified as Total Ionising Dose (TID), Single Event Effect (SEE) and Displacement Damage (DD). To ensure the performance of innovative components or materials that will be used in space, they must be tested before they are launched to space. Currently, only TID tests can be realized in Turkey but others cannot be performed yet. METU is building a beamline to perform some types of SEE tests. METU-DBL (Defocusing Beam Line) project supported by the Ministry of Development started in August 2015 is funded with 7 million TL. This project is conducted in collaboration with CERN for knowledge and technology transfer to Turkey. After this 10 meter long beamline is built, SEE tests can be performed with 15–30 MeV protons. As a part of this project, solar cells and Li-Ion battery of the IMECE satellite will be tested by METU-DBL.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"13 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":"131698070","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

Re-entry trajectory optimization for space shuttle using Sine-Cosine Algorithm 基于正弦余弦算法的航天飞机再入轨迹优化

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002982

Arunava Banerjee, M. Nabi

引用次数: 25

Low thrust gravity-assisted maneuvers for the spacecraft moving in the Earth-Moon system 在地月系统中移动的航天器的低推力重力辅助机动

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002974

M. Fain, O. Starinova

引用次数: 0

Attitude determination and control system for satellites in elliptical orbits — A complete solution 椭圆轨道卫星的姿态测定和控制系统。完整的解决方案

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002983

E. Oland

引用次数: 2

Design and implementation of the electrical power subsystem for a small satellite 某小型卫星电力子系统的设计与实现

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003000

Farhad Bagheroskouei, Shahab Karbasian, M. Baghban, Reza Amjadifard

引用次数: 2

Pseudo-linear approach to nanosatellite attitude estimation and magnetometer calibration 纳米卫星姿态估计和磁力计定标的伪线性方法

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003008

O. Khurshid, J. Selkàinaho, E. Kallio, A. Visala, H. Soken

{"title":"Pseudo-linear approach to nanosatellite attitude estimation and magnetometer calibration","authors":"O. Khurshid, J. Selkàinaho, E. Kallio, A. Visala, H. Soken","doi":"10.1109/RAST.2017.8003008","DOIUrl":"https://doi.org/10.1109/RAST.2017.8003008","url":null,"abstract":"This paper presents the pseudo-linear estimation approach to the high-rate spinning small spacecraft attitude estimation problem. The sensor suit utilised in the presented approach uses gyro, magnetometer and sun-sensor measurements. The presented estimation technique has been designed particularly for the problem of attitude determination during the Aalto-1 nanosatellite's Plasma Brake Experiment (PBE). The design of the PBE demands the satellite to be spun up to 200 deg/s for deploying the tether by the use of centrifugal force resulting from the spin motion. The spinning up of the satellite is achieved only through the magnetic actuation. The used spin controller has been proven to be very robust for different initial conditions and operating scenarios. However, it demands accurate attitude estimates in order to efficiently and successfully spin the satellite up to the required angular velocity. Magnetometers are the most important sensors amongst the available onboard for the presented setup. The reason for this is that the system has the inputs only from the magnetometers and gyros during the eclipse period. It is necessary to estimate the magnetometer biases because the systems are very closely integrated and there is a higher risk of electromagnetic interference in them. A pseudo-linear Kalman Filter (PSLKF) has been studied. The two cases of integrated and separate attitude estimation and magnetometer calibration algorithms have been studied and analyzed in the perspective of their use onboard a nanosatellite.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"32 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":"134645426","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

Bandwidth improvement in microstrip patch antenna 微带贴片天线的带宽改进

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003005

Ulaş Keskin, B. Döken, M. Kartal

引用次数: 12