Abstract:

For the problem of tire force estimation deviation caused by the change of mechanical properties due to temperature rise during the rolling process， the vertical force estimation correction algorithm of heavy-duty tires based on thermal-mechanical coupling is studied in this paper. A variable temperature mechanical tensile test is carried out to obtain the mechanical parameters of the tire shoulder rubber with temperature change， and a heavy-duty tire thermal-mechanical coupling model is established. The ground loading test and modal test are carried out to verify the accuracy of the model. The grounding characteristics and mechanical characteristics of heavy-duty tires under the action of variable temperature vertical force are discussed， and the sensitive characteristics of the grounding parameters of the vertical force are analyzed， with the sensitive signal offset caused by the temperature rise during rolling corrected. A heavy-duty tire vertical force estimation model based on the Gaussian regression process is established and the vertical force estimation accuracy before and after temperature correction is compared. The results show that when the sensitive characteristic value after temperature correction is used as input， the maximum error of the model under vertical force loading of 10~80 kN is 3.45%， with good vertical force estimation effect， and an improvement of the estimation accuracy by 9.17% compared with that before temperature correction.

Key words: intelligent tire, force estimation, temperature correction, thermal-mechanical coupling