The Mechanical Properties of Wheel Force Sensors and Their Impact on to the Data Collected - A Detailed Consideration of Specific Tests

Based on the results of “An Evaluation of the Mechanical Properties of Wheel Force Sensors and their Impact on to the Data Collected During Different Driving Manoeuvres” Herrmann et al. (SAE Paper 05M-254) a second, detailed investigation has been started to acquire additional information. In this previous investigation, it has been found out, that a difference in mass can be clearly identified in the signals.

The current paper summarizes the results of a detailed investigation, which has been performed at DaimlerChrysler Stress Lab in Auburn Hills, with a fully equipped vehicle - a set of 2/4 Wheel Force Sensors plus several acceleration sensors as well.

Through careful research and testing it is expected that the differences in the dynamic behavior can be specified with better accuracy than in the previous study. It is important to note that measurements of such type require a more sophisticated approach, considering stiffness, natural frequencies and the influence of the characteristics of the suspension as well - in order to be able to separate the different effects.