| 摘要 |
<p>An apparatus for testing the wheel suspension of a vehicle in the frequency domain, in particular the shock absorbing element of said suspension, comprises a measuring plate, a mechanism for oscillating said measuring plate with a frequency varying in a predetermined range, for example from 0-25 Hz, a measuring device for measuring the vertical forces exerted by a tyre of the vehicle on the measuring plate, a memory for storing the measured force values and a logic circuit for processing the measured force values. Further the apparatus is provided with means for storing the frequency values corresponding with said measured force values, means for storing a mathematical model of a linear second order mass spring system formed by the unsprung mass, the tyre and the shock absorbing element, means for determining the minimum force value and corresponding frequency value from said stored measured force values and corresponding frequency values, and means for computing a relative damping factor from said minimum measured force value and corresponding frequency value by means of said model.</p> |
