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Abstract

Research into the in-plane vibration properties of rotating tyre-wheel-hub assemblies involved the need to measure accurately small variations in the substantially larger angular velocity of an automotive wheel hub. Straightforward application of a tachogenerator to the task would have been subject to the classic measurement difficulty that the variable of interest was the small difference between two large quantities. The necessary accuracy would not have been achievable. The test wheel assembly was an automotive type, deriving from a vehicle fitted with anti-lock brakes. It was fitted with a toothed ring and variable reluctance proximity sensor in its standard form. A method for using this sensor's output to derive information on the wheel spin velocity variation was derived. The method used and its proof by simulation and by experimentation are described.

Keywords

measurement angular velocity vibration tyre

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References

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On the measurement of variations in the spin velocity of a wheel

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