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Algorithms for maneuvering spacecraft around small bodies
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Acikmese, A. Bechet Bayard, David |
| Copyright Year | 2006 |
| Description | A document describes mathematical derivations and applications of autonomous guidance algorithms for maneuvering spacecraft in the vicinities of small astronomical bodies like comets or asteroids. These algorithms compute fuel- or energy-optimal trajectories for typical maneuvers by solving the associated optimal-control problems with relevant control and state constraints. In the derivations, these problems are converted from their original continuous (infinite-dimensional) forms to finite-dimensional forms through (1) discretization of the time axis and (2) spectral discretization of control inputs via a finite number of Chebyshev basis functions. In these doubly discretized problems, the Chebyshev coefficients are the variables. These problems are, variously, either convex programming problems or programming problems that can be convexified. The resulting discrete problems are convex parameter-optimization problems; this is desirable because one can take advantage of very efficient and robust algorithms that have been developed previously and are well established for solving such problems. These algorithms are fast, do not require initial guesses, and always converge to global optima. Following the derivations, the algorithms are demonstrated by applying them to numerical examples of flyby, descent-to-hover, and ascent-from-hover maneuvers. |
| File Size | 51763 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110012961 |
| Archival Resource Key | ark:/13960/t2w42qq52 |
| Language | English |
| Publisher Date | 2006-08-01 |
| Access Restriction | Open |
| Subject Keyword | Space Communications, Spacecraft Communications, Command And Tracking Comets Algorithms Rendezvous Guidance Autonomous Navigation Asteroids Spacecraft Guidance Trajectories Autonomy Maneuvers Space Navigation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
