www.hbm.com Test and Measurement HBM Case Study Introduction While manufacturers now perform computer simulations on all new rail car designs and modi? cations, they still perform on-track tests before releasing designs or modi? cations to production or to diagnose performance problems. The reason for this is that simulation is not 100% accurate, and the only way to really demonstrate that a design meets performance speci? cations is to perform an actual on-track test. This is why on-track tests of most new vehicle designs are required for cars used in the North American Freight Service. To perform these tests, you measure forces, accelerations, and displacements at critical locations on the rail car being tested by installing a number of sensors at those locations. You then co

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