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The investigation of tethered satellite system dynamics [microform] : quarterly report, #3 for the period 15 February 1985 through 14 May 1985 / principal investigator, Enrico C. Lorenzini, co-investigators David A. Arnold, Mario D. Grossi, Gordon E. Gullahorn ... [et al.] ; prepared for National Aeronautics and Space Administration, Marshall Space Flight Center
Bib ID 4311757
Format MicroformMicroform, BookBook
Author
Lorenzini, Enrico C
 
Description Cambridge, Mass. : Smithsonian Institution, Astrophysical Observatory ; [Springfield, Va. : National Technical Information Service, distributor, 1985] 
ii, 54 p. : ill. ; 28 cm. 
Series

NASA contractor report ; NASA CR-175855.

Summary

"The tether control law to retrieve the satellite was modified in order to have a smooth retrieval trajectory of the satellite that minimizes the thruster activation. The satellite thrusters were added to the rotational dynamics computer code and a preliminary control logic was implemented to simulate them during the retrieval maneuver. The high resolution computer code for modelling the three dimensional dynamics of untensioned tether, SLACK3, was made fully operative and a set of computer simulations of possible tether breakages was run. The distribution of the electric field around an electrodynamic tether in vacuo severed at some length from the shuttle was computed with a three dimensional electrodynamic computer code."

Notes

"June 1985."

Distributed to depository libraries on microfiche.

Contract NAS8-36160

Reproduction Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1985. 1 microfiche. 
Subjects Tethered satellites.  |  Control theory.  |  Dynamic control.  |  Mathematical models.  |  Payload retrieval (STS)  |  Tethered satellites.
Other authors/contributors Arnold, David A  |  Grossi, Mario D  |  Gullahorn, Gordon E  |  Smithsonian Astrophysical Observatory  |  George C. Marshall Space Flight Center
Available From NASA 
Govt. Doc. Number NAS 1.26:175855 

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