NTRS - NASA Technical Reports Server

As of October 27, 2023, NASA STI Services will no longer have an embargo for accepted manuscripts. For more information visit NTRS News.

Back to Results
Check-Cases for Verification of 6-Degree-of-Freedom Flight Vehicle SimulationsThe rise of innovative unmanned aeronautical systems and the emergence of commercial space activities have resulted in a number of relatively new aerospace organizations that are designing innovative systems and solutions. These organizations use a variety of commercial off-the-shelf and in-house-developed simulation and analysis tools including 6-degree-of-freedom (6-DOF) flight simulation tools. The increased affordability of computing capability has made highfidelity flight simulation practical for all participants. Verification of the tools' equations-of-motion and environment models (e.g., atmosphere, gravitation, and geodesy) is desirable to assure accuracy of results. However, aside from simple textbook examples, minimal verification data exists in open literature for 6-DOF flight simulation problems. This assessment compared multiple solution trajectories to a set of verification check-cases that covered atmospheric and exo-atmospheric (i.e., orbital) flight. Each scenario consisted of predefined flight vehicles, initial conditions, and maneuvers. These scenarios were implemented and executed in a variety of analytical and real-time simulation tools. This tool-set included simulation tools in a variety of programming languages based on modified flat-Earth, round- Earth, and rotating oblate spheroidal Earth geodesy and gravitation models, and independently derived equations-of-motion and propagation techniques. The resulting simulated parameter trajectories were compared by over-plotting and difference-plotting to yield a family of solutions. In total, seven simulation tools were exercised.
Document ID
Document Type
Technical Memorandum (TM)
Murri, Daniel G.
(NASA Langley Research Center Hampton, VA, United States)
Jackson, E. Bruce
(NASA Langley Research Center Hampton, VA, United States)
Shelton, Robert O.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
February 3, 2015
Publication Date
January 1, 2015
Subject Category
Aeronautics (General)
Computer Programming And Software
Report/Patent Number
NASA/TM-2015-218675/Vol I
Funding Number(s)
WBS: WBS 869021.
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available