Accession Number : ADA501767


Title :   Assessment of Adaptive Guidance for Responsive Launch Vehicles and Spacecraft


Descriptive Note : Final rept. 20 Apr 2005-29 Jan 2009


Corporate Author : IOWA STATE UNIV AMES DEPT OF AEROSPACE ENGINEERING


Personal Author(s) : Lu, Ping


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a501767.pdf


Report Date : 29 Apr 2009


Pagination or Media Count : 122


Abstract : This project sets out to identify and address the need for adaptive ascent guidance techniques necessary for responsive launch. This report provides comprehensive details to two recent advanced ascent guidance algorithms, tailored to endo-atmospheric and exo-atmospheric optimal ascent with possibly multiple stages, respectively. These algorithms generate optimal ascent guidance commands based on the current state of the vehicle, the currently selected targeting condition, and available vehicle/environment modeling and wind information. The algorithms depend on no vehicle-specific characteristics therefore are applicable to different types of launch vehicles without the need for significantly modifying the software. Verification, validation and extensive testing of the algorithms are performed with many mission scenarios and a number of different launch vehicle configurations, including winged reusable and conventional expandable, single-stage and multiple-stage, launch vehicles. This work demonstrates that promising techniques and algorithms have reached a level where launch ascent planning can benefit from automation based on these advances to significantly reduce ascent guidance planning time and potential realization of fully closed-loop optimal ascent guidance from liftoff to orbital insertion is possible.


Descriptors :   *LAUNCH VEHICLES , *SPACECRAFT , *ASCENT TRAJECTORIES , *GUIDANCE , VERIFICATION , VALIDATION , MODELS , WIND , TIME , PLANNING , CONFIGURATIONS , MISSIONS , LAUNCHING , ADAPTIVE SYSTEMS , TARGETING , EXOSPHERE , CLOSED LOOP SYSTEMS , ENVIRONMENTS , OPTIMIZATION , SCENARIOS , COMPUTER PROGRAMS , ALGORITHMS


Subject Categories : Unmanned Spacecraft
      Spacecraft Trajectories and Reentry
      Numerical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE