Near-Optimal Operation of Dual-Fuel Launch Vehicles
Bookreader Item Preview
Share or Embed This Item
texts
Near-Optimal Operation of Dual-Fuel Launch Vehicles
- Publication date
- 1996
- Usage
- Public Domain
- Topics
- SEA ICE, STANDARD DEVIATION, MEAN, THICKNESS, RADIOMETERS, SATELLITE OBSERVATION, MICROWAVE IMAGERY, MICROWAVE SIGNATURES, ALGORITHMS, MICROWAVE EMISSION, ANTARCTIC REGIONS, BRIGHTNESS TEMPERATURE, SNOW COVER
- Collection
- nasa_techdocs
- Contributor
- NASA
- Language
- English
- Rights
- Public Domain
A near-optimal guidance law for the ascent trajectory from earth surface to earth orbit of a fully reusable single-stage-to-orbit pure rocket launch vehicle is derived. Of interest are both the optimal operation of the propulsion system and the optimal flight path. A methodology is developed to investigate the optimal throttle switching of dual-fuel engines. The method is based on selecting propulsion system modes and parameters that maximize a certain performance function. This function is derived from consideration of the energy-state model of the aircraft equations of motion. Because the density of liquid hydrogen is relatively low, the sensitivity of perturbations in volume need to be taken into consideration as well as weight sensitivity. The cost functional is a weighted sum of fuel mass and volume; the weighting factor is chosen to minimize vehicle empty weight for a given payload mass and volume in orbit.
- Accession-id
- 97N19227
- Addeddate
- 2011-05-23 06:02:27
- Document-source
- CASI
- Documentid
- 19970016839
- Identifier
- nasa_techdoc_19970016839
- Identifier-ark
- ark:/13960/t5j971n8p
- Nasa-center
- Ames Research Center
- Ocr
- ABBYY FineReader 8.0
- Online-source
- http://wayback.archive-it.org/1792/20100128164017/http://hdl.handle.net/2060/19970016839
- Original-nasa-rights
- Unclassified; No Copyright; Unlimited; Publicly available;
- Ppi
- 300
- Report-number
- NAS 1.15:104640; NASA-TM-104640; Rept-97B00003
- Updated-added-to-ntrs
- 2009-05-08
- Year
- 1996
comment
Reviews
There are no reviews yet. Be the first one to
write a review.
233 Views
DOWNLOAD OPTIONS
For users with print-disabilities
IN COLLECTIONS
NASA Technical DocumentsUploaded by Greg Williamson on