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Martynas Mila?evicius and Laurynas Maciulis
This paper presents a state-of-the-art overview of fine beam steering mechanisms for free-space optical communication on satellites. Precise beam pointing is a critical task for the successful operation of free-space optical communication systems. Based ...
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Ting Jin, Guohua Kang, Jian Cai, Shaoxia Jia, Jinghua Yang, Xinghua Zhang, Zhenhua Zhang, Long Li and Fangfang Liu
The low-frequency disturbances transmitted by flexible cables are difficult to be attenuated for a novel disturbance-free payload spacecraft, which decreases the payload?s pointing accuracy and stability. In this research, a new spacecraft configuration ...
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Ha Duyen Trung
Recently, a combination of unmanned aerial vehicles (UAVs) and free-space optics (FSO) has been investigated as a potential method for high data-rate front-haul communication links. The aim of this work was to address the performance of UAV-to-ground sta...
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José Henrique de Andrade,Francisco Andrea Simões Braga,Luciano Campanini,Josadak Astorino Marçola,Bruna Carvalho Nunes Rocha
Pág. 1551 - 1564
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Koki Hamajima, Kei Yasukawa, Masazumi Ueba, Hisayoshi Kanou, Munehiro Matsui, Junichi Abe, Kiyohiko Itokawa and Fumihiro Yamashita
Among several usages of unmanned aerial vehicles (UAV), wireless relay systems for high altitudes using fixed-wing UAVs, or high-altitude platform stations (HAPS), are some of the most promising applications. To realize the systems by making the most of ...
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Jianying Wang, Hongxi Yin, Xiuyang Ji and Yanjun Liang
Both the long-term beam spreading caused by ocean turbulence and the pointing errors induced by the jitter of transmitters and receivers degrade the performance of underwater wireless optical communication (UWOC) links. To effectively alleviate their eff...
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Chen Huang, Yimin Chen, Weiqin Tong, Tao Feng and Mingxing Deng
As an effective solution for data visualization and analysis, the large-scale high-resolution display wall system has been widely used in various scientific research fields. On the basis of investigating existing system cases and research results, this p...
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Yixin Zhang, Qingze Yan, Lin Yu and Yun Zhu
The model of information capacity for underwater wireless optical communication (UWOC) links with pointing errors and the carrier of perfect Laguerre?Gaussian (PLG) beam in absorbed and weakly turbulent seawater is modeled. Using this model, the influenc...
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Andrea Colagrossi and Michèle Lavagna
The capability to orient the solar arrays of a spacecraft toward the Sun is an ultimate asset for any attitude determination and control subsystem (ADCS). This ability should be maintained in any operative circumstance, either nominal or off-nominal, to ...
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Geuk-Nam Kim, Sang-Young Park, Sehyun Seong, Jae-Young Choi, Sang-Kook Han, Young-Eon Kim, Suyong Choi, Joohee Lee, Sungmoon Lee, Han-Gyeol Ryu and Seonghui Kim
With growth in data volume from space missions, interest in laser communications has increased, owing to their importance for high-speed data transfer in the commercial and defense fields, spaceborne remote sensing, and surveillance. Here, we propose a n...
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Ting Jin, Guohua Kang, Jian Cai, Shaoxia Jia, Jinghua Yang, Xinghua Zhang, Zhenhua Zhang, Long Li and Fangfang Liu
For a novel disturbance-free payload (DFP) spacecraft, it is difficult to isolate the low-frequency disturbances owing to the umbilical cables, which decreases the pointing accuracy and stability of the payload. In this research, an improved DFP spacecra...
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Girolamo Costanza, Giovanni Ottavio Delle Monache, Maria Elisa Tata and Stefano Filosi
The next generation lunar reflector (NGLR) experiment is one of the experiments selected by NASA in the framework of the commercial lunar payload services (CLPS) initiative. The experiment, inspired by the lunar laser ranging (LLR) experiments of the Apo...
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Youngwon Ryan Kim, Suhan Park and Gerard J. Kim
In this paper, we propose and explore a touch screen based interaction technique, called the ?Blurry Touch Finger? for EasyVR, a mobile VR platform with non-isolating flip-on glasses that allows the fingers accessible to the screen. We demonstrate that, ...
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Mykola Raransky,Alla Oliinych-Lysiuk,Roman Tashchuk,Mykhailo Unhurian
Pág. 6 - 13
This paper reports the analysis of patterns and mechanisms that form the characteristic surfaces of the Young modulus, the angular distributions of Poisson coefficients, and the pointing surfaces of auxeticity of single crystals in cubic, hexagonal, tetr...
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Chiuhsiang Joe Lin, Dino Caesaron and Bereket Haile Woldegiorgis
Recent developments in virtual environment applications allow users to interact with three-dimensional (3D) objects in virtual environments. As interaction with 3D objects in virtual environments becomes more established, it is important to investigate u...
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M. Salim Farissi, Stefano Carletta, Augusto Nascetti and Paolo Teofilatto
The subject of this work is the implementation and experimental testing of a purely magnetic attitude control strategy, which can provide stabilization after the deployment and pointing of the spacecraft without any attitude information. In particular, t...
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Victor E. L. Gasparetto, Jackson Reid, William P. Parsons, Mostafa S. A. ElSayed, Mohamed Saad, Stephen Shieldand, Gary L. Brown and Lawrence M. Hilliard
This paper proposes a design procedure to determine the optimal configuration of multi-degrees of freedom (MDOF) multiple tuned mass dampers (MTMD) to mitigate the global dynamic aeroelastic response of aerospace structures. The computation of the aerody...
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Huaibo Yao, Yixin Huang, Wenlai Ma, Lei Liang and Yang Zhao
Joints are widely used in large deployable structures but show semi-rigidity due to performance degradation and some nonlinear factors affecting the structure?s dynamic characteristics. This paper investigates the influence of semi-rigid joints on the ch...
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Isha Chauhan and Manav R. Bhatnagar
In this work, we investigate the impact of the transmit aperture selection technique to alleviate the effect of jamming on a free space optical (FSO) communication system. We consider the FSO system to suffer from a jamming signal and Gaussian noise conc...
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Driss Oumbarek Espinos, Amin Ghaith, Thomas André, Charles Kitégi, Mourad Sebdaoui, Alexandre Loulergue, Fabrice Marteau, Frédéric Blache, Mathieu Valléau, Marie Labat, Alain Lestrade, Eléonore Roussel, Cédric Thaury, Sébastien Corde, Guillaume Lambert, Olena Kononenko, Jean-Philippe Goddet, Amar Tafzi, Victor Malka and Marie-Emmanuelle Couprie
Laser plasma acceleration (LPA) capable of providing femtosecond and GeV electron beams in cm scale distances brings a high interest for different applications, such as free electron laser and future colliders. Nevertheless, LPA high divergence and energ...
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