|
Search | Add a publication |
| ID No : | 599 Edit | Title: | Algorithms for Maneuvering Spacecraft Around Small Bodies |
| Summary / Review : | "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." (Author's abstract) |
| Author(s) : |
Acikmese, A. Bechet; Bayard, David, [Jet Propulsion Laboratory] |
| Publication Date: | 2006 |
| Category(s) : |
Transportation / Asteroid Orbit |
| Progress Type: | A ( A=Analysis only, D=Design, T=Testing, C=Completed or Commercial product ) |
| Web URL : |
http://hdl.handle.net/2060/20110012961; http://www.techbriefs.com/component/content/51?task=view
If this link is broken, please Add Comment below. We try to keep author contact details, and a backup copy in our offline library. |
| PERMANENT code(s) : | L,U |
|
(Explanation of the last 3 rows above) |
In the row above, there are up to 4 possibilities: U = URL you can click on to get a copy instantly from another source on the internet, or request it from that source D = Downloadable from PERMANENT (such as because no other URL known...) L = LAN copy, PERMANENT has a digital copy but not downloadable from our website P = Paper copy in the PERMANENT office Typically, only 0 to 3 methods are available. |
| NTRS : | 20110012961 |
| Other Ref # : | NPO-41322 |
| Submitted by : | MEP |
| Comments: |
Please add your thoughtful Comments to this paper after reading it. All comments are reviewed and approved before being posted publicly below. If you wish to submit a private comment to the curator, instead of a public comment, just write "Private" at the start of your comment. Corrections and suggested additions to our records are appreciated. |
Add Comment |