| Citation: | LIU Y X，LIU Z H，GAO Q H，et al. Joint estimation algorithm of vertical force and lateral force of heavy-duty tire based on internal strain analysis of tire[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（11）：3532-3541 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0816
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In order to estimate the lateral force of a tire, this paper proposed a joint estimation algorithm of vertical force and lateral force of a heavy-duty tire based on internal circumferential strain analysis of the tire. A 16.00R20 heavy-duty tire was taken as the research object, and the finite element model of the tire was established. The tests on vertical stiffness and vibration characteristics were carried out to verify the validity of the model. Based on the circumferential strain signal analysis of the tire liner, the correlation model of the peak spacing angle of the circumferential strain curve with the grounding angle and the grounding length was established, and the characterization accuracy under static load, rolling, and lateral force conditions was compared. Through the internal circumferential strain analysis of the symmetrical point of the tire, the characterization feature of the lateral force was extracted, and the linear relationship between the characterization feature and the vertical force was analyzed. The joint estimation model of vertical force and lateral force based on support vector regression was established, and the vertical force was estimated by using grounding angle and grounding length as input recognition features. Then, the lateral force was estimated by characterization features of lateral force combined with vertical force estimation. The estimation accuracy of the model was verified by a finite element test. The results indicate that the characterization error of grounding angle and grounding length based on zero-order and first-order peak spacing angle of the strain curve is less than 4.5%. The joint estimation algorithm of vertical force and lateral force based on internal strain analysis of the tire is suitable for static load, rolling, and lateral force conditions and can accurately estimate the vertical force and lateral force. The error between the estimated value and the finite element simulation value is less than 3%.
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