Search Results

The advanced inflatable airlock (AIA) system was developed for the Space Launch Initiative (SLI). The objective of the AIA system is to greatly reduce the cost associated with performing extravehicular activity (EVA) from manned launch vehicles by reducing launch weight and volume from previous hard airlock systems such as the Space Shuttle and Space Station airlocks. The AIA system builds upon previous technology from the TransHab inflatable structures project, from Space Shuttle and Space Station Airlock systems, and from terrestrial flexible structures projects. The AIA system design is required to be versatile and capable of modification to fit any platform or vehicle needing EVA capability. During the basic phase of the program, the AIA conceptual design and key features were developed to help meet the SLI program goals of reduced cost and program risk.

Spacecraft air must be treated to control the concentrations of carbon dioxide and other contaminants while also controlling oxygen concentration, humidity and temperature. These requirements in a low gravity environment currently lead to complex systems requiring substantial volume and mass. A direct liquid contact system can be used to contact recirculation air with small liquid droplets to control humidity and temperature, while managing the concentrations of carbon dioxide and other air impurities. The absorbent liquid concentration and temperature, combined with the recirculation rate can be used to independently control temperature, humidity, and carbon dioxide concentrations. The absorbent liquid is removed from the air stream using a centrifugal separator, and carbon dioxide is vented or chemically pumped to a higher pressure receiver for reuse.

The Advanced Inflatable Airlock (AIA) System is currently being developed for the 2nd Generation Reusable Launch Vehicle (RLV). The objective of the AIA System is to greatly reduce the cost associated with performing extravehicular activity (EVA) from the RLV by reducing launch weight and volume from previous hard airlock systems such as the Space Shuttle and Space Station airlocks. The AIA System builds upon previous technology from the TransHab inflatable structures project, from Space Shuttle and Space Station Airlock systems, and from terrestrial flexible structures projects. The AIA system design is required to be versatile and capable of modification to fit any platform or vehicle needing EVA capability. This paper discusses the AIA conceptual design and key features that will help meet the 2nd Generation RLV program goals of reduced cost and program risk.