The Navigation System on the NASA Space Launch System (SLS) Block 1 vehicle performs initial alignment of the Inertial Navigation System (INS) navigation frame through gyrocompass alignment (GCA). In lieu of direct testing of GCA accuracy in support of requirement verification, the SLS Navigation Team proposed and conducted an engineering test to, among other things, validate the GCA performance and overall behavior of the SLS INS model through comparison with test data. This paper will detail dynamic hardware testing of the SLS INS, conducted by the SLS Navigation Team at Marshall Space Flight Center's 6DOF Table Facility, in support of GCA performance characterization and INS model validation. A 6-DOF motion platform was used to produce 6DOF pad twist and sway dynamics while a simulated SLS flight computer communicated with the INS. Tests conducted include an evaluation of GCA algorithm robustness to increasingly dynamic pad environments, an examination of GCA algorithm stability and accuracy over long durations, and a long-duration static test to gather enough data for Allan Variance analysis. Test setup, execution, and data analysis will be discussed, including analysis performed in support of SLS INS model validation.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    6DOF Testing of the SLS Inertial Navigation Unit



    Conference:

    Annual Guidance and Control Conference ; 2018 ; Breckenridge, CO, United States


    Publication date :

    2018-02-02


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    6DOF Testing of the SLS Inertial Navigation Unit

    Geohagan, Kevin / Bernard, William / Oliver, T. Emerson et al. | NTRS | 2018


    The Space Operations Simulation Center: A 6DOF Laboratory for Testing Relative Navigation Systems (AAS 14-116)

    Ahlbrandt, S. / Huish, D. / Burr, C. et al. | British Library Conference Proceedings | 2014


    Inertial Navigation Systems Testing Handbooks

    L. D. Plews / C. W. Brinkley / K. E. Reeser | NTIS | 1976


    6DOF Metrology-integrated Robot Control

    Kihlman, Henrik / Loser, Raimund | SAE Technical Papers | 2003


    Inertial navigation device and inertial navigation method

    MORI DAIKI / HATTORI YOSHIKAZU / SUGIURA HIDEKI et al. | European Patent Office | 2022

    Free access