Philosophies Applied in the Selection of Spacesuit Joint Range-of-Motion Requirements

Space suits are the most important tool for astronauts working in harsh space and planetary environments; suits keep crewmembers alive and allow them to perform exploration, construction, and scientific tasks on a routine basis over a period of several months. The efficiency with which the tasks are performed is largely dictated by the mobility features of the space suit. For previous space suit development programs, the mobility requirements were written as pure functional mobility requirements that did not separate joint ranges of motion from joint torques. The Constellation Space Suit Element has the goal to make more quantitative mobility requirements that focused on the individual components of ‘mobility’ to enable future suit designers to build and test systems more effectively. This paper details the test planning and selection process for the Constellation space suit pressure garment range of motion requirements.