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Optical position detection to measure tyre carcass deflections

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Active safety systems would benefit from tyre force and friction potential information. Different sensor concepts, including, among others, the EU-funded Apollo-project developed tyre sensor based on optical position detection, are being studied. The sensor can measure tyre carcass deflections with respect to the rim. The carcass deflections can be used to calculate tyre forces and they may be exploited in the estimation of friction potential. The waveforms of the sensor signal are illustrated. The vertical and lateral force estimations are presented with unavoidable compensation parts. The tyre sensor measurements were compared to the measurement-vehicle results and good correlations achieved. Continuing activities are concerned with the estimation of friction potential and the detection of aquaplaning.
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Keywords: optical position detection; tyre force estimation; tyre sensor

Document Type: Research Article

Affiliations: Laboratory of Automotive Engineering, TKK, Helsinki University of Technology, Finland

Publication date: 2008-06-01

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