タイヤ内面のひずみ計測によるタイヤ‐路面接触特性の推定

抄録

From a point of view of handling and stability, it is important to bring automotive tires into contact with the road correctly. If the contact state of the tire is known while moving, more advanced vehicle control can be carried out. However it is difficult to know whether tires contact with road correctly and tires produce the force enough to drive safety while moving. In this research, we formulate how to estimate contact patch's condition and side force, slip angle, camber angle of the tire using tire tester machine by measuring the deformation of tires with the strain gauges of three places attached in the inner. In addition to the strain in the circumferential direction of the prior art, the lateral direction is measured newly. From the measurement results, the vertical load could be estimated from the contact length of the middle, the lateral force and slip angle could be estimated from the relationship between the lateral force and slip angle the ratio of the contact length of the left and right, camber angle could be estimated from the relationship of the difference between the right and left lateral strain and the ratio of the contact length. By mounting a tire with a strain gauge, it is possible to clarify vertical load, slip angle, camber angle, which is a parameter necessary for the vehicle state estimation.