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UID:0-519@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20151104T163000

DTEND;TZID=Asia/Jerusalem:20151104T173000

DTSTAMP:20230603T193028Z

URL:https://aerospace.technion.ac.il/events/long-term-satellite-cluster-fl
 ight-using-differential-drag/

SUMMARY:Long-term Satellite Cluster Flight Using Differential-Drag
DESCRIPTION:Lecturer:Ohad Ben-Yaacov\n Faculty:Department of Aerospace Engi
 neering\n Institute:Technion – Israel Institute of Technology\n Location
 :Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstra
 ct: \n Details: \n One of the key issues in future space technologies is t
 he relative position control of a satellite cluster\, known as cluster fli
 ght. Cluster flight entails maximal and minimal inter-satellite distance c
 onstraints\, in order to prevent an unacceptable drift and avoid collision
 s.\nThe purpose of this research is to enable fuelless cluster flight by u
 sing differential-drag. This ability will render the thrusters unnecessary
 \, which will constitute a breakthrough in the field of cluster flight. To
  that end\, nonlinear differential drag-based controllers suitable for imp
 lementation in long-term missions were developed\, for a cluster consistin
 g of multiple modules. Numerical simulations show promising performance of
  the maximal distance controller. The minimal distance controller successf
 ully prevents the cluster from colliding. These algorithms are planned to 
 be implemented on-board the Space Autonomous Mission for Swarming and Geo-
 locating Nanosatellites (SAMSON).\nSince any drag-based control algorithm 
 must cope with significant uncertainties\, the closed-loop system performa
 nce was examined through a covariance analysis. The method used for uncert
 ainty quantification is the Linear Covariance Analysis.\nFinally\, a new a
 nalytical method for calculating the satellite projected cross-sectional a
 reas and concomitant torques was developed. The knowledge of this area is 
 essential for approximating the forces and torques induced by atmospheric 
 drag and solar radiation pressure\, and it is also required for implementi
 ng various attitude control modes.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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