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Motion planning for multi-spacecraft...

University of Michigan.

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Motion planning for multi-spacecraft interferometric imaging systems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Motion planning for multi-spacecraft interferometric imaging systems./
作者:	Hussein, Islam I.
面頁冊數:	310 p.
附註:	Chairs: Anthony M. Bloch; Daniel J. Scheeres.
Contained By:	Dissertation Abstracts International66-02B.
標題:	Engineering, Aerospace. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3163827
ISBN:	9780496981700

Motion planning for multi-spacecraft interferometric imaging systems.
Hussein, Islam I.

Motion planning for multi-spacecraft interferometric imaging systems. - 310 p.

Chairs: Anthony M. Bloch; Daniel J. Scheeres.

Thesis (Ph.D.)--University of Michigan, 2005.

The use of multiple spacecraft formations to form interferometric images offer many advantages, including replacement of large monolithic telescopes, superior angular resolution and the possibility of reconfiguration for different imaging goals. These capabilities are all relevant to various NASA missions under the Origins program. This work focuses on designing space-based formations for improved image quality using the fundamental concept of the modulation transfer function (MTF). A derivation is given of the MTF for sparse aperture interferometric imaging systems under some stated assumptions. The MTF is then used to design free-flying and rigid observatories.

ISBN: 9780496981700Subjects--Topical Terms:

1018395
Engineering, Aerospace.

Motion planning for multi-spacecraft interferometric imaging systems.
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245 1 0 $a Motion planning for multi-spacecraft interferometric imaging systems.
300 $a 310 p.
500 $a Chairs: Anthony M. Bloch; Daniel J. Scheeres.
500 $a Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 1007.
502 $a Thesis (Ph.D.)--University of Michigan, 2005.
520 $a The use of multiple spacecraft formations to form interferometric images offer many advantages, including replacement of large monolithic telescopes, superior angular resolution and the possibility of reconfiguration for different imaging goals. These capabilities are all relevant to various NASA missions under the Origins program. This work focuses on designing space-based formations for improved image quality using the fundamental concept of the modulation transfer function (MTF). A derivation is given of the MTF for sparse aperture interferometric imaging systems under some stated assumptions. The MTF is then used to design free-flying and rigid observatories.
520 $a In a free-flying formation, the spacecraft are viewed as a set of N point particles or, more generally, N rigid bodies evolving on a manifold M designed to achieve improved focusing properties. This leads to a study of the formation on the special Euclidean group SE(3) and its subgroups (SO(3) and R3 ) subject to some motion constraints. Various constrained optimal control problems are formulated to achieve minimum fuel expenditure while meeting imaging specifications such as high image quality and improved angular resolution. Necessary conditions are derived, which provide further insight into the properties of an optimal formation. Finally, the study is reduced to a class of two-spacecraft spiraling maneuvers, for which the global optimal solution is obtained. In a rigid formation, on the other hand, the relative position between a spacecraft pair is fixed in magnitude. An Earth-orbiting observatory that satisfies the necessary conditions, with the potential to be implemented in future Origins missions, is proposed and studied.
590 $a School code: 0127.
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710 2 0 $a University of Michigan. $3 777416
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790 1 0 $a Scheeres, Daniel J., $e advisor
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