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To meet the requirements of single-axis pointing in safety modes and other specific tasks of microsatellites, this paper presents a single-axis pointing magnetic control method. This method comprises the following steps: First, use a spatial geometric analysis method to expand the selection range of the rotation axis to an axis plane and then obtain the angular acceleration plane through affine transformation...
Taking KT-1A satellite in practical flight as the research object, this paper adopts LOR infinite horizon periodic controller to perform the three-axis stabilized attitude control, and the magnetorquer is taken as the only actuator. It specially studies the application constraints produced by different assumptions in the mathematical model which may not be met in actual projects, including that the...
Authors in this paper mainly employ Ne (electron density), and Te (electron temperature) data of Langmuir Probe Instrument (ISL) onboard DEMETER, to study the variations of electron density and electron temperature associated with strong earthquakes. Tonga Mw 7.9 earthquake case study shows that revisited orbits of 09768_1 and 09782_1 (before and after shock, respectively) within 4 months data before...
Rapid urban expansion in the surrounding area is a major reason of ecological environment deterioration. This research adopted SLEUTH model and imported the result of ecological environment analysis as the excluded layer by building multi-factor comprehensive decision model, therefore, realized a loose couple of urban growth model and ecological environment analysis. The result indicates that this...
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