Case Study 4 - Space Station Assembly Simulation

BHMS Enables Simulation and Analyses of IVA and EVA Operations

Visual accessibility of International Space Station (ISS) structure by the Extravehicular Activity (EVA) crewmember for EVA PowerTool use. Boeing's Flight Crew Integration Group in Huntington Beach utilizes the BHMS for evaluation of on-orbit assembly, maintenance and operation tasks for the International Space Station (ISS). Intravechicular Activity (IVA) anthropometry and vision requirements are being verified exclusively with BHMS. Previous anthropometry and vision analyses were conducted with simulated zero-g and one-g full scale mock-up testing. By using BHMS for verification, simulated zero-g testing is not required, thereby reducing costly mock-up costs and cycle times.

BHMS simulation of Extravehicular Activity (EVA) is steadily increasing. BHMS analyses are performed to determine proper placement of Worksite Interface Sockets. These sockets are used to attach the Articulating Portable Foot Restraints (APFRs) from which the space-suited crew accesses assembly components and fasteners. BHMS EVA task simulations are conducted to establish physical access from each APFR location. In addition, Vision Obscuration plots are generated with EVA manikins positioned on the APFR. By analyzing these plots, engineers can verify that the crew will have the visual access required to perform their tasks. By using BHMS, the number of sockets can be minimized while ensuring all crew-members have the physical and visual access required for successful completion of assembly and maintenance tasks. 

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