In order to minimize the loss of bone and muscle mass during spaceflight, the Multi-purpose Crew Vehicle (MPCV) will include an exercise device and enough free space within the cabin for astronauts to use the device effectively. The NASA Digital Astronaut Project (DAP) has been tasked with using computational modeling to aid in determining whether or not the available operational volume is sufficient for in-flight exercise.Motion capture data was acquired using a 12-camera Smart DX system (BTS Bioengineering, Brooklyn, NY), while exercisers performed 9 resistive exercises without volume restrictions in a 1g environment. Data were collected from two male subjects, one being in the 99th percentile of height and the other in the 50th percentile of height, using between 25 and 60 motion capture markers. Motion capture data was also recorded as a third subject, also near the 50th percentile in height, performed aerobic rowing during a parabolic flight. A motion capture system and algorithms developed previously and presented at last years HRP-IWS were utilized to collect and process the data from the parabolic flight [1]. These motions were applied to a scaled version of a biomechanical model within the biomechanical modeling software OpenSim [2], and the volume sweeps of the motions were visually assessed against an imported CAD model of the operational volume. Further numerical analysis was performed using Matlab (Mathworks, Natick, MA) and the OpenSim API. This analysis determined the location of every marker in space over the duration of the exercise motion, and the distance of each marker to the nearest surface of the volume. Containment of the exercise motions within the operational volume was determined on a per-exercise and per-subject basis. The orientation of the exerciser and the angle of the footplate were two important factors upon which containment was dependent. Regions where the exercise motion exceeds the bounds of the operational volume have been identified by determining which markers from the motion capture exceed the operational volume and by how much. A credibility assessment of this analysis was performed in accordance with NASA-STD-7009 prior to delivery to the MPCV program.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    MPCV Exercise Operational Volume Analysis


    Contributors:
    Godfrey, A. (author) / Humphreys, B. (author) / Funk, J. (author) / Perusek, G. (author) / Lewandowski, B. E. (author)

    Conference:

    Annual Space Radiation Investigators'' Workshop ; 2017 ; Galveston, TX, United States
    Human Research Program Investigator''s Workshop (HRP IWS 2017) ; 2017 ; Galveston, TX, United States


    Publication date :

    2017-01-23


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    MPCV Aerothermodynamic Database

    Kirk, Lindsay | NTRS | 2013


    MPCV Aerothermodynamic Database

    L. Kirk | NTIS | 2013


    Orion MPCV Nonlinear Dynamics Uncertainty

    Adam Johnson / Paul Bremner / Matt Griebel et al. | NTRS


    Closed Loop Control Compact Exercise Device for Use on MPCV

    Sheehan, Chris / Funk, Justin / Funk, Nathan et al. | NTRS | 2016


    THE MPCV-ESM CONSUMABLES STORAGE SUBSYSTEM

    Lamantea, M.M. / Finetto, C. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2013