A space suit s mobility is critical to an astronaut s ability to perform work efficiently. As mobility increases, the astronaut can perform tasks for longer durations with less fatigue. The term mobility, with respect to space suits, is defined in terms of two key components: joint range of motion and joint torque. Individually these measures describe the path which in which a joint travels and the force required to move it through that path. Previous space suits mobility requirements were defined as the collective result of these two measures and verified by the completion of discrete functional tasks. While a valid way to impose mobility requirements, such a method does necessitate a solid understanding of the operational scenarios in which the final suit will be performing. Because the Constellation space suit system requirements are being finalized with a relatively immature concept of operations, the Space Suit Element team elected to define mobility in terms of its constituent parts to increase the likelihood that the future pressure garment will be mobile enough to enable a broad scope of undefined exploration activities. The range of motion requirements were defined by measuring the ranges of motion test subjects achieved while performing a series of joint maximizing tasks in a variety of flight and prototype space suits. The definition of joint torque requirements has proved more elusive. NASA evaluated several different approaches to the problem before deciding to generate requirements based on unmanned joint torque evaluations of six different space suit configurations being articulated through 16 separate joint movements. This paper discusses the experiment design, data analysis and results, and the process used to determine the final values for the Constellation pressure garment joint torque requirements.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Results and Analysis from Space Suit Joint Torque Testing


    Contributors:

    Conference:

    40th International Conference on Environmental Systems ; 2010 ; Barcelona, Spain


    Publication date :

    2009-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





    Results and Analysis from Space Suit Joint Torque Testing

    Matty, J. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2010



    Space Suit Joint Torque Measurement Method Validation

    Valish, D. / Eversley, K. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2012


    Space Suit Joint Torque Measurement Method Validation

    Valish, Dana / Eversley, Karina | AIAA | 2012