PREDICTION OF WHEEL NUMERIC FOR SANDY-TIRE

Prediction of Tire Pattern Noise

The characteristics of tire/road interaction noise are mainly determined by the tread pattern of a tire and it is known that the impact force at leading edge of tire is the main cause of the pattern noise. This study is concerned with the prediction of tire pattern noise: The procedure involves the measurement of the impact force at leading edge, the employment of Hertzian impact theory and lon...

Improvement of wheel skidder tractive performance by tire inflation pressure and tire chains

Nacrtak The motion resistance ratio, gross traction ratio and net traction ratio of a wheel cable skidder were determined and mathematical models derived for three tire inflation pressure values with or without tire chains on forest road in mountainous conditions. The motion resistance ratio increases with the increase of tire inflation pressure. On the contrary, the gross traction ratio increa...

Vision-based determination of wheel camber angle and tire deflection

Accurate determination of vehicle’s lateral behavior is necessary in the domain of vehicle dynamics and more particularly in the context of improvement of vehicle safety. Thus, a cutting-edge knowledge of its interaction with the road surface is primordial. In consequence, the integration of a force model, representing the tire/ground interface, into the global vehicle model is needed. The vali...

Estimation of vehicle sideslip, tire force and wheel cornering stiffness

This paper presents a process for the estimation of tire-road forces, vehicle sideslip angle and wheel cornering stiffness. The method uses measurements (yaw rate, longitudinal/lateral accelerations, steering angle and angular wheel velocities) only from sensors which can be integrated or have already been integrated in modern cars. The estimation process is based on two blocks in series: the f...

Aircraft tire temperature at touchdown with wheel prerotation