東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Optimal control of electrodynamic te...

Air Force Institute of Technology.

Linked to FindBook

Google Book

Amazon

博客來

Optimal control of electrodynamic tether satellites.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Optimal control of electrodynamic tether satellites./
Author:	Stevens, Robert E.
Description:	141 p.
Notes:	Adviser: William E. Wiesel.
Contained By:	Dissertation Abstracts International69-06B.
Subject:	Engineering, Aerospace. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3319545
ISBN:	9780549703990

Optimal control of electrodynamic tether satellites.
Stevens, Robert E.

Optimal control of electrodynamic tether satellites. - 141 p.

Adviser: William E. Wiesel.

Thesis (Ph.D.)--Air Force Institute of Technology, 2008.

Low thrust propulsion systems offer a fuel-efficient means to maneuver satellites to new orbits, however they can only perform such maneuvers when they are continuously operated for a long time. Such long-term maneuvers occur over many orbital revolutions often rendering short time scale trajectory optimization methods ineffective. An approach to multirevolution, long time scale optimal control of an electrodynamic tether is investigated for a tethered satellite system in Low Earth Orbit with atmospheric drag. Control is assumed to be periodic over several orbits since under the assumptions of a nearly circular orbit, periodic control yields the only solution that significantly contributes to secular changes in the orbital parameters. The optimal control problem is constructed in such a way as to maneuver the satellite to a new orbit while minimizing a cost function subject to the constraints of the time-averaged equations of motion by controlling current in the tether. To accurately capture the tether orbital dynamics, libration is modeled and controlled over long time scales in a similar manner to the orbital states. Libration is addressed in two parts; equilibrium and stability analysis, and control. Libration equations of motion are derived and analyzed to provide equilibrium and stability criteria that define the constraints of the design. A new libration mean square state is introduced and constrained to maintain libration within an acceptable envelope throughout a given maneuver. Optimal control solutions are achieved using a pseudospectral method that maneuver an electrodynamic tether to new orbits over long time scales while managing librational motion using only current in a wire.

ISBN: 9780549703990Subjects--Topical Terms:

1018395
Engineering, Aerospace.

Optimal control of electrodynamic tether satellites.
LDR:02611nmm 2200289 a 45 001 862631
005 20100721
008 100721s2008 ||||||||||||||||| ||eng d
020 $a 9780549703990
035 $a (UMI)AAI3319545
035 $a AAI3319545
040 $a UMI $c UMI
100 1 $a Stevens, Robert E. $3 1030468
245 1 0 $a Optimal control of electrodynamic tether satellites.
300 $a 141 p.
500 $a Adviser: William E. Wiesel.
500 $a Source: Dissertation Abstracts International, Volume: 69-06, Section: B, page: 3682.
502 $a Thesis (Ph.D.)--Air Force Institute of Technology, 2008.
520 $a Low thrust propulsion systems offer a fuel-efficient means to maneuver satellites to new orbits, however they can only perform such maneuvers when they are continuously operated for a long time. Such long-term maneuvers occur over many orbital revolutions often rendering short time scale trajectory optimization methods ineffective. An approach to multirevolution, long time scale optimal control of an electrodynamic tether is investigated for a tethered satellite system in Low Earth Orbit with atmospheric drag. Control is assumed to be periodic over several orbits since under the assumptions of a nearly circular orbit, periodic control yields the only solution that significantly contributes to secular changes in the orbital parameters. The optimal control problem is constructed in such a way as to maneuver the satellite to a new orbit while minimizing a cost function subject to the constraints of the time-averaged equations of motion by controlling current in the tether. To accurately capture the tether orbital dynamics, libration is modeled and controlled over long time scales in a similar manner to the orbital states. Libration is addressed in two parts; equilibrium and stability analysis, and control. Libration equations of motion are derived and analyzed to provide equilibrium and stability criteria that define the constraints of the design. A new libration mean square state is introduced and constrained to maintain libration within an acceptable envelope throughout a given maneuver. Optimal control solutions are achieved using a pseudospectral method that maneuver an electrodynamic tether to new orbits over long time scales while managing librational motion using only current in a wire.
590 $a School code: 0002.
650 4 $a Engineering, Aerospace. $3 1018395
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Engineering, System Science. $3 1018128
690 $a 0538
690 $a 0544
690 $a 0790
710 2 $a Air Force Institute of Technology. $3 1030467
773 0 $t Dissertation Abstracts International $g 69-06B.
790 $a 0002
790 1 0 $a Wiesel, William E., $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3319545