The last time we wrote about vibration we talked about our work with rollers. We were noting how the rollers showed the same FFT graph shape, but the excitation was not the same as when tested on the road. For a refresher on this check out our last post here.

Based on all of our vibration work to date, we determined that the best way to find an impedance break point was to develop an algorithm that would calculate the amount of energy produced by a wheel and tire combination at various tire pressures. Our previous work showed that as the tire pressure increased, the energy of the system increased as well. If we could plot this successfully, our belief was that we would see an increase in the slope of a line that plotted tire pressure vs wheel energy at the impedance break point.