To optimize performance and functionality of active-materials based devices, they must be modeled and analyzed. Neck Injury Prevention Expert System (NIPES) developed by ESI systematically analyzes the effects of variations in physical and mechanical properties of prototype active material devices (e.g., NECSUS). NIPES uses our proprietary Expert System Integrated Development Environment (ESIDE®) that allows seamless integration with AutoCAD®, Simulink®, Dymola, Modelica, experimental data models, and Finite Element Models (FEM). NIPES models head/neck biomechanics in 3D, designs prototype NECSUS, provides 3D visualization and animation. The analysis and optimization are mainly based on a quantitative comparison of prototype NECSUS support effect on activation levels of cervical muscles.


Users of the NIPES can combine different neck models, prototype NECSUS models, and constitutive models in order set up their test designs and simulation parameters. Comparative analysis of unprotected subjects and subjects protected with NECSUS is then performed. Review of simulation and analysis results can be performed graphically and using text tables. Various parameters of the NIPES models, such as biological, physical and mechanical properties can be modified by the user. Parameters affecting functionality of prototypeNECSUS devices can be set. Motion trajectories of the neck/head can be set in accordance with operational tasks and desired specifications of NECSUS system being designed.

The NIPES technologies and software architecture are modular and can be expanded to address other active material devices and applications.