Abstract:

Vertical force plays an important role in vehicle control and it is also an important parameter of intelligent tires. This paper proposes a vertical force estimation algorithm combining sensor with the physical model. According to the characteristics of the acceleration curve， the relationship between the acceleration signal of the inner liner and the contact angle of the tire is analyzed. The contact angle estimation algorithm is verified by finite simulation. The relationship between the contact angle and vertical force is established by the ring model and the correctness is verified by the tire test. The finite element is used to simulate the intelligent tire and the predicted value of the vertical force and the simulation value are compared. The results show that the method combining the sensor with the tire model can quickly and accurately estimate the vertical force.

Key words: intelligent tire, acceleration, physical model, vertical force