Active human body model for virtual occupant response, step 5
Research Project, 2021 – 2023

Purpose and goal: Active human body models (A-HBMs) are vital tools for restraint developments. They embody humanlike characteristics and the active muscle control makes them capable in complex crash sequences.
The project aims to introduce a more advanced head controller, and to further refine the upper body control for prediction of humanlike response when transferring between upright, forward leaning and reclined postures. In addition, the first step in addressing population variability is taken, by modelling the average female in addition to average male model. Expected results and effects: The SAFER HBM is capable of combinations of braking/steering followed by impact, and the first steps in vertical responses are taken. It is used for occupant protection evaluations by seamlessly simulating pre-crash manoeuvres followed by a crash. Although, being world-leading in its 3D and seamless whole sequence capabilities, it is today limited to mid-size male in one muscle tuning setting. In addition, its capabilities for more reclined sitting postures is unknown, and its active head regulation needs further attention. This project aims to improve these areas. Approach and implementation: Following prior steps of A-HBM projects and collaborating with other projects in the development of the SAFER HBM, this project focuses on the muscle modelling and the related data for validation. The project includes model developments on advanced head controller and improved torso muscle controller, and takes steps toward the diverse population of occupants, by tests and analysis of volunteers in relevant dynamic events. The project is executed by a PhD student and several senior researchers in close industrial-academic collaboration.


Johan Davidsson (contact)

Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Safety


Autoliv AB

Vårgårda, Sweden

Dynamore Nordic AB

Linköping, Sweden

Volvo Cars

Göteborg, Sweden



Project ID: 2020-05155
Funding Chalmers participation during 2021–2023

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