Orbital maintenance of endoatmospheric low earth-orbiting satellites
Pauls, David D.
Cleary, David D.
MetadataShow full item record
The optimization of spacecraft trajectories in vacuum has received extensive consideration since the inception of space flight, yet the effects of atmosphere have been largely neglected. The advent of low Earth-orbiting, large satellites and platforms necessitates that atmosphere be included in the optimization process. A practical means of studying this topic is as a problem in minimum-fuel orbital maintenance is optimized through periodic thrusting as opposed to forcing Keplarian motion by nullifying the effects of drag with thrust. Further, this must be optimized by primary vectoring. This thesis examined the efficiency of a simple method of orbital maintenance using fixed-angle transverse thrusting. Results show that for the purpose of fuel-minimization, the width of the radial band in which the satellite is to be maintained, is dependent upon thruster size. in nearly all cases, a thrust-angle of 70 degrees maximized the fuel saved. This thesis shows that fixed-angle transverse thrusting does not improve on forced Keplarian motion and hence thrust vectoring must be optimized.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Wilsey, Mark S.; Ross, I. Michael (Monterey, California. Naval Postgraduate School, 1993-03);With the advent of long term low Earth-orbiting satellites comes the requirement to maintain a specified orbital radial band. Optimal control theory suggests that periodic thrusting is more efficient than forced Keplerian ...
Chierico, Paul Stephen (University of Rhode Island, 2014);The topic that was investigated was whether there is a lift and thrust benefit to flapping an underwater, biologically inspired three dimensional foil near the solid bottom surface (so that it was in ground effect). The ...
Jones, K.D.; Castro, B.M.; Mahmoud, O.; Platzer, M.F. (2002);An experimental and numerical investigation of flapping-wing propulsion in ground effect is undertaken. Flying in ground effect is shown to have substantial performance advantages both in thrust and efficiency. To gain the ...