Description: Topic H3.01 captures the need for robust, multipurpose deployable structures with high packing efficiencies for next generation orbital habitats. Multiple launch and payload providers have expressed interest in repurposing pressure vessels as on-orbit habitats and require outfitting for secondary structure, floors and dividers, ECLS ducting, thermal control accommodation, radiation shielding, wiring, lighting etc. to make the volume functional. The proposed innovation uses multi-functional, intelligent fabrics in a tensioned membrane architecture that can be deployed by means of (a) pressurized annulus envelope that when inflated, expands against the habitat hull to anchor the structure while (b) multipurpose telescoping tubes at the core of the habitat expand in the axial direction across the opposing bulkheads to index the annulus pressure vessels. Tensioned membrane structures exhibit the highest specific stiffness of any known structure and can produce significant weight savings over hybrid structural designs. Inflatable structures package well and can significantly reduce stowed volume requirements and dampen launch vibro-acoustics. An inflatable habitat structure can most effectively address packaging, deployment, damage tolerance, ease of repair and in-flight maintenance. With lightweight rigging, these secondary structures will be designed to be fully repositionable, creating a modular approach to habitat outfitting. The Paragon/TRLA team will develop a design that packages efficiently, deploys repeatability, and provides valuable capabilities including a.) minimum mass, design simplicity, minimal parts count, b.) a structure which folds efficiently deployment repeatability c.) secondary soft goods fabricated which are integrated during build-up yielding minimal ground handling loads, and d.) flooring, walls, ECLS air flow ducts, TCS fluid loops, lighting, electrical/data lines, and radiation protection structures all integrated in unison during buildup.

Benefits: The demand for space related habitats is starting to emerge. For example, the Inspiration Mars (IM) Foundation proposed a mission to Mars that included an inflatable habitat. Additionally, test flights to ISS have been proposed that deliver inflatable habitats for increased research space as well as for housing precursor tests for long-duration missions such as IM. The IM architecture study proposed a pre-flight experiment to the ISS that could use the proposed HOUSE solution for the pressure structure. Bigelow Aerospace, for which TRLA built the now-flying units in orbit, has staked the company?s future on the use of inflatable structures. The potential post applications of the proposed are targeted for manned habitats including lunar surface system habitats, airlocks and other crewed vessels. The NextSTEP program, which seeks commercial development of deep space exploration capabilities, will support more extensive human spaceflight. Under the NextSTEP program, NASA seeks to support human spaceflight missions to beyond low-Earth orbit (LEO). Other potential post applications can range from NASA commercial applications including deployable antenna reflectors, solar collectors, solar sails, payload fairings, water storage tanks, cryogenic propellant tanks, greenhouse enclosures, debris shields, radiation shields, re-entry vehicles, large telescopes, propellant depots, rover vehicles, orbital debris removal systems, emergency escape vehicle (ISS), and Martian air ships.

Non-NASA application customers can include the Army and other DoD agencies in need of shelters. Other Non-NASA applications include: air bags, high altitude air ships, aerostats, compressed air energy storage, underwater habitats, underwater emergency escape systems (submarine), portable storage tanks for oil transport, remote fuel depot stations, remote water storage tanks for forest fire control, cargo lift balloons, large, deep space antenna reflector for ground stations, antenna radome, emergency shelters, and troop shelters with integrated ballistic protection.