Suit Mass Evaluations on POGO, NBL, NEEMO, Parabolic Flight
Responsible HRP Element:
Human Health Countermeasures
Completed - Task has been completed
The current studies will identify and refine the range of acceptable suit masses for prototype exploration EVA suits that permit crewmembers to perform critical mission tasks effectively and efficiently. The mass of the suit needs to be sufficient for a given gravity level such that crewmembers have adequate ground reaction forces to conduct both gross ambulation and fine geology tasks, for example. Evidence from earlier EPSP testing indicated that a heavier suit optimized for 1/6-gravity impairs performance at 3/8-g, and a lighter suit optimized for Mars gravity is extremely difficult to control during activities at simulated Moon gravity. Therefore the aim of these evaluations is to define an acceptable range of suit masses for each gravity condition and, if possible, a mass range that would be suitable for both Moon and Mars. Suit designers may require modular suits if a single suit is required for both (or all) gravity conditions. The following studies have been completed to address this task: CG Assessment (during Exploration Scenario activities); Optimal Weight of Suit Assessment (during Exploration Scenario activities); EVA CG Assessments; EVA CG & Optimal Suit Weight Assessments; EVA Optimal Suit Weight; EVA Work Efficiency Index (WEI) assessment; Constellation Program (CxP) EVA Systems SE&I FY'07 Test 1 - "Metabolic Costs and Biomechanics of a Planetary Suit"; Constellation Program (CxP) EVA Systems SE&I FY-07 Test 2 - "Metabolic Costs and Biomechanics of Exploration Tasks in a Planetary Suit"; Effect of Center of Gravity and Suit Weight on Human Performance in Partial Gravity; EVA CG Assessments; EVA CG & Optimal Suit Weight Assessments; EVA Optimal Suit Weight; EVA CG Assessments; EVA Optimal Suit Weight; EVA Work Efficiency Index (WEI) assessment; Exploration Scenario 2; EVA CG Assessments; EVA Optimal Suit Weight; Task Efficiency; EVA Work Efficiency Index (WEI) assessment; EVA CG Assessments; EVA Task Efficiency Index (TEI) assessment; EVA Work Efficiency Index (WEI) assessment; Integrated Parabolic Flight Test: Effects of Center of Gravity & Mass on the Biomechanics, Kinematics, & Operator Compensation of Exploration Tasks in Lunar Gravity. Pending future exploration missions, additional studies may be required.
These studies are being coordinated and performed by a cross-center team that includes personnel from Constellation EVA Systems Project Office, and Life Sciences (ABF, EPSP, ECP, Neurosciences).