Isaac Head and Neck Restraint System


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For Full-Blown Math Addicts

Defining the geometry to be a function of the forces, and the forces to be a function of the geometry yields a set of simultaneous, partial differential equations rather than a single, ordinary differential equation.

From a practical standpoint, building and solving a set of simultaneous, partial differential equations representing a complex, three-dimensional, dynamic system is a huge task. One must consider the properties (geometry, density, elasticity, etc.) of the drivers seat, body restraint system, the body itself, the head-helmet combination and the dampers. Readers familiar with computational methods (computer simulations) will recognize that this problem is most efficiently solved using finite element analysis, or FEA. Fortunately, the Bioengineering Center at Wayne State University has such an FEA model (TNO-MADYMO) designed specifically to simulate the body's response to racing crashes.

After Isaac® engineers developed the initial design equations, they crash tested a prototype at the Wayne State lab. While the results were generally good, they realized that final tuning of the system required more computational horsepower and completed the design work with the University's computational model.

copyright © 2003-2013 Isaac, LLC
U.S. Patent #7,155,747
other domestic and foreign patents pending
all rights reserved