Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Valdemir Carrara"'
Publikováno v:
IEEE Access, Vol 12, Pp 2340-2348 (2024)
With an increasing demand for nanosatellites to perform accurate pointing, such as on Earth observation missions, the availability and accuracy of the orbital position and velocity information on board the satellite’s computer become indispensable,
Externí odkaz:
https://doaj.org/article/b148d11a123a4eb39c8ae5a8405b8be7
Autor:
Valdemir Carrara, Rafael Barbosa Januzi, Daniel Hideaki Makita, Luis Felipe de Paula Santos, Lidia Shibuya Sato
Publikováno v:
Journal of Aerospace Technology and Management, Vol 9, Iss 2 (2017)
Because they are inexpensive platforms for satellites, CubeSats have become a low-cost way for universities and even developing countries to have access to space technology. This paper presents the ITASAT design, particularly the Attitude Determinati
Externí odkaz:
https://doaj.org/article/2f6d2f7f918346c8a6b7f201e016cbf9
Autor:
Guilherme Silveira, Valdemir Carrara
Publikováno v:
Journal of Aerospace Technology and Management, Vol 7, Iss 2 (2015)
The use of digital simulation has become an essential activity during the development and operation of launch vehicles, due to the complexity of such systems. Of particular interest is the flight dynamics simulation, which investigates the behavior o
Externí odkaz:
https://doaj.org/article/800c3e9f0cf4425bbdd212f13dc34d31
Publikováno v:
Journal of Aerospace Technology and Management, Vol 6, Iss 2 (2014)
This paper presents the simulation results of an aeroassisted maneuver around the Earth, between coplanar circular orbits, from a geostationary orbit to a low orbit. The simulator developed considers a reference trajectory and a trajectory perturbed
Externí odkaz:
https://doaj.org/article/f4a0ed4f80e046eb818554d2ea2839b7
Autor:
Valdemir Carrara
Publikováno v:
Biblioteca Digital de Teses e Dissertações do INPEInstituto Nacional de Pesquisas EspaciaisINPE.
Este trabalho investiga o uso de redes neurais em controle de atitude de satélites artificiais. Com a intenção de validar esta aplicação, optou-se por um satélite que não fosse constituído por um corpo rígido, mas que possuísse um comportam
Externí odkaz:
http://urlib.net/sid.inpe.br/iris@1905/2005/07.29.05.41
Autor:
Valdemir Carrara
Publikováno v:
Biblioteca Digital de Teses e Dissertações do INPEInstituto Nacional de Pesquisas EspaciaisINPE.
A crescente necessidade de simular, com a máxima precisão, tanto a posição quanto a atitude de satélites artificiais tem provocado o desenvolvimento de teorias mais sofisticadas, que calculam as forças perturbadas que atuam nestes satélites. E
Externí odkaz:
http://urlib.net/sid.inpe.br/iris@1905/2005/07.27.15.12
Autor:
Helio Koiti Kuga, Samuel R.C. Vale, Ricardo O. Duarte, Valdemir Carrara, Camila B.A. Garcia, Luiz S. Martins-Filho
Publikováno v:
Measurement. 116:391-401
This article presents an assessment step of the development of a fault tolerant attitude determination system (SDATF) for nanosatellites. This system will be flight validated as payload of the NanosatC-BR2, a 2U-size cubesat that is being developed b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c3bba1c8827fe85f375ff12815bc2bf
https://doi.org/10.1016/j.measurement.2017.11.040
https://doi.org/10.1016/j.measurement.2017.11.040
Publikováno v:
IEEE Latin America Transactions. 15:835-842
CubeSat attracted interest of international community with numerous studies being developed in some universities, schools or even space enthusiastic. Miniaturization of components and use of conventional electronics reduced costs with space projects,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7e9eb8a3b87d5085627ad4767a2a14c
https://doi.org/10.1109/tla.2017.7910196
https://doi.org/10.1109/tla.2017.7910196
Publikováno v:
Computational and Applied Mathematics. 38
Reaction wheels have been largely employed as primary actuators in attitude control systems to perform pointing functions in Earth observation satellites. Their dynamic behavior characterization and proper velocity control are relevant tasks in the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6acf37015e129c0fcc887059a3a4ff19
https://doi.org/10.1007/s40314-019-0784-x
https://doi.org/10.1007/s40314-019-0784-x
Autor:
Helio Koiti Kuga, Valdemir Carrara
Publikováno v:
Applied Mechanics and Materials. 706:170-180
This paper presents some approaches to the design and some experimental results for current and speed control loops of a reaction wheel (RW). Reaction wheels are largely employed in satellite attitude control due to its large range of torque capabili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9f49d673a464af83cd30af3649567f5
https://doi.org/10.4028/www.scientific.net/amm.706.170
https://doi.org/10.4028/www.scientific.net/amm.706.170