Conceptual designs for a space suit Personal Life Support Subsystem (PLSS) were developed and ass... more Conceptual designs for a space suit Personal Life Support Subsystem (PLSS) were developed and assessed to determine if upgrading the system using new, emerging, or projected technologies to fulfill basic functions would result in mass, volume, or performance improvements. Technologies were identified to satisfy each of the functions of the PLSS in three environments (zero-g, Lunar, and Martian) and in three time frames (2006, 2010, and 2020). The viability of candidate technologies was evaluated against performance requirements using evaluation criteria such as safety, technology readiness, and relaibility. System concepts (schematics) were developed for combinations of time frame and environment by assigning specific technologies to each of four key functions of the PLSS -- oxygen supply, waste removal, thermal control, and power. The PLSS concepts were evaluated using the ExtraVehicular Activity System Sizing Analysis Tool, software created by NASA to analyze mass and volume parameters and to balance power and thermal loads for each integrated system. The assessment resulted in TEES recommending to NASA an evolution path from the existing PLSS to a long duration, low mass PLSS suitable for Martian missions.
Conceptual designs for a space suit Personal Life Support Subsystem (PLSS) were developed and ass... more Conceptual designs for a space suit Personal Life Support Subsystem (PLSS) were developed and assessed to determine if upgrading the system using new, emerging, or projected technologies to fulfill basic functions would result in mass, volume, or performance improvements. Technologies were identified to satisfy each of the functions of the PLSS in three environments (zero-g, Lunar, and Martian) and in three time frames (2006, 2010, and 2020). The viability of candidate technologies was evaluated against performance requirements using evaluation criteria such as safety, technology readiness, and relaibility. System concepts (schematics) were developed for combinations of time frame and environment by assigning specific technologies to each of four key functions of the PLSS -- oxygen supply, waste removal, thermal control, and power. The PLSS concepts were evaluated using the ExtraVehicular Activity System Sizing Analysis Tool, software created by NASA to analyze mass and volume parameters and to balance power and thermal loads for each integrated system. The assessment resulted in TEES recommending to NASA an evolution path from the existing PLSS to a long duration, low mass PLSS suitable for Martian missions.
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