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    Autocommander: A Supervisory Controller for Integrated Guidance and Control for the 2nd Generation Reusable Launch Vehicle (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper presents a hierarchical architecture for integrated guidance and control that achieves risk and cost reduction for NASA's 2d generation reusable launch vehicle (RLV). Guidance, attitude control, and control allocation subsystems that heretofore operated independently will now work cooperatively under the coordination of a top-level autocommander. In addition to delivering improved performance from a flight mechanics perspective, the autocommander is intended to provide an autonomous supervisory control capability for traditional mission management under nominal conditions, G&C reconfiguration in response to effector saturation, and abort mode decision-making upon vehicle malfunction. This high-level functionality is to be implemented through the development of a relational database that is populated with the broad range of vehicle and mission specific data and translated into a discrete event system model for analysis, simulation, and onboard implementation. A Stateflow Autocoder software tool that translates the database into the Stateflow component of a Matlab/Simulink simulation is also presented.
    Keywords: Spacecraft Instrumentation and Astrionics
    Type: 2002 AIAA GN and C Conference; Aug 05, 2002 - Aug 08, 2002; Monterey, CA; United States
    Format: application/pdf
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  • 2
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    A Perspective on Development Flight Instrumentation and Flight Test Analysis Plans for Ares I-X (2009)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASA. s Constellation Program will take a significant step toward completion of the Ares I crew launch vehicle with the flight test of Ares I-X and completion of the Ares I-X post-flight evaluation. The Ares I-X flight test vehicle is an ascent development flight test that will acquire flight data early enough to impact the design and development of the Ares I. As the primary customer for flight data from the Ares I-X mission, Ares I has been the major driver in the definition of the Development Flight Instrumentation (DFI). This paper focuses on the DFI development process and the plans for post-flight evaluation of the resulting data to impact the Ares I design. Efforts for determining the DFI for Ares I-X began in the fall of 2005, and significant effort to refine and implement the Ares I-X DFI has been expended since that time. This paper will present a perspective in the development and implementation of the DFI. Emphasis will be placed on the process by which the list was established and changes were made to that list due to imposed constraints. The paper will also discuss the plans for the analysis of the DFI data following the flight and a summary of flight evaluation tasks to be performed in support of tools and models validation for design and development.
    Keywords: Spacecraft Instrumentation and Astrionics
    Type: IAC-09-D2.6.5 , LF99-8463 , 60th International Astronautical Congress; Oct 12, 2009 - Oct 16, 2009; Daejeon; Korea, Republic of
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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