Arto J. Niskanen

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The tyre-road contact area was studied visually by means of a high-speed camera and three accelerometers fixed to the inner liner of the tyre carcass. Both methods show a distorted contact area in wet conditions, but interesting differences appeared. First, the contact area in full aquaplaning seems strongly distorted on a glass plate when subjected to(More)
An intelligent tyre system enables the active chassis control system to directly access the information about tyre-road interactions. However, supplying power to the system is still a bottleneck which limits the applicability of the intelligent tyre system. This paper proposes a piezoelectric energy harvesting system with energy storage to address this(More)
Tyre-road contact condition information would benefit many vehicle safety and control systems. However, direct information is still not available in production vehicles. Tyre sensing could provide this necessary information but many aspects must still be studied. In this paper, a physical ring tyre model is used to estimate and remove the acceleration(More)
Ever increasing amount of Advanced Driver Assisting Systems (ADAS) are being developed to improve the safety of the vehicles. However, the direct information of the tyre-road contact is not available for these systems. An intelligent tyre has been proposed to provide that information in many studies. This paper focuses on water and aquaplaning detection(More)
Direct tire-road contact friction estimation is essential for future autonomous cars and active safety systems. Friction estimation methods have been proposed earlier for driving conditions in the presence of a slip angle or slip ratio. However, the estimation of the friction from a freely-rolling tire is still an unsolved topic. Knowing the existing(More)
Direct tyre-road contact friction estimation is essential for future active safety systems. Friction estimation methods were proposed earlier for driving conditions in the presence of a slip angle or slip ratio. However, the estimation of friction from a freely rolling tyre is still an unsolved topic. This study uses three 3-axis accelerometers on the inner(More)
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