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Model-Based GN and C Simulation and Flight Software Development for Orion Missions beyond LEOFor Orion missions beyond low Earth orbit (LEO), the Guidance, Navigation, and Control (GN&C) system is being developed using a model-based approach for simulation and flight software. Lessons learned from the development of GN&C algorithms and flight software for the Orion Exploration Flight Test One (EFT-1) vehicle have been applied to the development of further capabilities for Orion GN&C beyond EFT-1. Continuing the use of a Model-Based Development (MBD) approach with the Matlab®/Simulink® tool suite, the process for GN&C development and analysis has been largely improved. Furthermore, a model-based simulation environment in Simulink, rather than an external C-based simulation, greatly eases the process for development of flight algorithms. The benefits seen by employing lessons learned from EFT-1 are described, as well as the approach for implementing additional MBD techniques. Also detailed are the key enablers for improvements to the MBD process, including enhanced configuration management techniques for model-based software systems, automated code and artifact generation, and automated testing and integration.
Document ID
Document Type
Conference Paper
Odegard, Ryan (Draper (Charles Stark) Lab., Inc. Houston, TX, United States)
Milenkovic, Zoran (Draper (Charles Stark) Lab., Inc. Arlington, VA, United States)
Henry, Joel (NASA Johnson Space Center Houston, TX, United States)
Buttacoli, Michael (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
April 24, 2014
Publication Date
March 1, 2014
Subject Category
Astronautics (General)
Computer Programming and Software
Report/Patent Number
Meeting Information
2014 IEEE Aerospace Conference(Big Sky, Montana)
Funding Number(s)
WBS: WBS 747797.
Distribution Limits
Public Use Permitted.

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