The Human Suit Interaction Model (HSIM) is currently being developed in a joint project between the Aerospace Human Systems Laboratory (AHSL) and Intuitive Machines. The models will then be tested dynamically and contact models and interactions between human and suit will be created.
HSIM utilizes the Project Chrono engine and Skinned Multi-Person Linear Model (SMPL). Project Chrono is an open-source multi-body physics engine developed by the University of Wisconsin. SMPL is a statistical 3D poseable avatar created by the Max Planck Institute. HSIM combines both of these powerful tools to allow the AHSL to model the interaction between a human and EVA suit utilizing accurate physics models. Dynamic analyses of joint force and torque as a function of body motion are possible using this model and a 96-core computational machine. While this project is still in development, there is much potential for using this powerful tool to develop the next generation of spacesuits.
Intuitive Machines has constructed a 96-core computer to be used for simulation and modeling purposes. The computer will be used to model digital human-suit interactions. By utilizing SMPL human models and the CHRONO physics engine, digital models of humans (created by scans from the 3dMD system), will be married to a suit design. This simulation tool will allow the lab to test suit fit and function without ever constructing any suit hardware. This will allow for rapid prototyping and testing for various suit designs. The computer system will also allow for the modeling of partial gravity fluid physics using Computational Fluid Dynamics (CFD) models.