This article presents a method to identify friction between tyre and road based on measurements of side force, self aligning moment and vertical load of the tyre. Theory shows that an estimate of the friction can be made as soon as the tyre is partially sliding. Results of outdoor experiments with the tyre test trailer support the theory. The set up of a low cost measurement system in the front suspension of a passenger car requires accurate modelling of the complex suspension kinematics. Feedforward neural networks have been employed both for modelling suspension kinematics and for identification of the tyre/road friction. Even though the system currently disregards suspension and tyre dynamics, it produces reasonable results, both in computer simulations and in the actual test vehicle. Moreover, extension of the method to include dynamic behaviour is possible in principle and in the authors' view the proposed method of using the tyre as a sensor to estimate friction will prove to be a viable method.
The tyre as a sensor to estimate friction
1996
15 Seiten, 12 Bilder, 12 Quellen
Conference paper
English
The Tyre as a Sensor to Estimate Friction
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|The Tyre as a Sensor to Estimate Friction
British Library Conference Proceedings | 1997
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