| 摘要 |
Method and system for determining a reference speed indicative of true ground speed of a vehicle having a plurality of axles are provided. The reference speed for a designated one of the axles is dynamically adjusted to account for changes in vehicular acceleration that may occur while determination of the reference speed is being performed. The method allows collecting a stream of samples over respective sampling intervals of at least one motion-indication parameter corresponding to a respective axle of the vehicle. In one aspect thereof, one may use a torque reduction rulebase configured to avoid high torque reduction, and inaccuracies in the motion-indication parameter due to high levels of creep, if any, in a wheel of the respective axle. The method further allows estimating an inertia value for the vehicle based on respective changes in tractive effort and acceleration over each sampling interval. The collected motion parameter samples may be adjusted for changes in acceleration over each sampling interval using the estimated inertial value. A signal indicative of axle speed may be limited to at least one respective limit value of rate and magnitude based on the inertially-adjusted parameter samples to, for example, provide accurate slip control.
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