نتایج جستجو برای: attitude determination
تعداد نتایج: 329269 فیلتر نتایج به سال:
To meet the asymmetric (sub micro-radian towards Earth, tens of micro-radians elsewhere) pointingrequirements of the RIP mission, a hybrid approach to optical attitude determination is suggested. Aredundant pair of Coarse Star Scanners (CSS) have line-of-sight normal to the spin axis. If attitude updaterates are not too high, a straightforward extension of presently available techno...
the study aims to achieve research and testing of hypotheses survey techniques and questionnaires to collect information used. 61 questions in the questionnaire included 15 questions and 46 open questions according to research in the study population, girls and their mothers as the value of different children investment should be. mothers according to the research community benefits from havi...
The sun vector is commonly used for defining a satellite attitude and many types of sensors exist for its determination. An attitude determination system is designed for each satellite project based on missions’ requirements. A fine pinhole sun sensor type was chosen and designed for HORYU-IV nanosatellite of Kyushu Institute of Technology. This sensor has a round-shaped hole and uses commercia...
This paper presents a new method that permits to solve the problem of determination of a modelled 3D-object spatial attitude from a single perspective image and to compute the covariance matrix associated to the attitude parameters. Its principle is based on the interpretation of at least three segments as the perspective projection of linear ridges of the object model and on the iterative sear...
In this paper a novel night sky star pattern recognition and precise centroiding approaches are proposed. Precision and computation time of image processing algorithm paly a great role in spacecraft in which the night sky star images are utilized for attitude determination. Star pattern recognition and centroiding are the most important steps of image processing algorithm in such attitude deter...
Abstract – A study of a three-axis stabilized satellite attitude control in geostationary orbit is presented. The analysis is based on a neural predictive approach using Kalman filtering algorithms. Optimization of a quadratic performance functional is used to determine the discrete predictive control actions. The control determination on a typical iteration is viewed as a stochastic optimal li...
Advances in the technology of low cost solid-state inertial sensors have brought the price for a inertial measurement unit (IMU) down to the $ 10,000 level. Such an IMU, Systron Donners’ MotionPak, has been purchased by the Institute of Geodesy and Navigation (IfEN) in order to develop an integrated GPS/INS attitude determination system. As GPS component for the integrated system, IfEN has sele...
Automatic dependent surveillance-broadcast (ADS-B) is a very important communication and surveillance technology in air traffic control (ATC). In the future, more satellites will carry out ADS-B to perform global coverage. order make full use of resources satellite, this paper proposes solution for satellite three-axis attitude determination using receiver. The principle ADS-B-based presented f...
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