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| 小侧偏角下轮胎残余回正力矩算法的研究 |
| Study on Algorithm of Tire Residual Aligning Torque in Small Slip Angle |
| Received:August 24, 2018 Revised:August 24, 2018 |
| DOI：10.12135/j.issn.1006-8171.2019.07.0443 |
| 中文关键词: 轮胎；角度效应残余回正力矩；锥度效应残余回正力矩；多项式拟合曲线 |
| 英文关键词: tire；PRAT；CRAT；polynomial fitting curve |
| 基金项目: |
| 中图分类号: |
| Author Name | Affiliation | E-mail | | qiuchangfeng* | Qingdao Double Star Tire Industry Co., Ltd. | qcf825@163.com | | chenrenquan | Qingdao Double Star Tire Industry Co., Ltd. | | | liujunjie | Qingdao Double Star Tire Industry Co., Ltd. | | | sunxiangyang | Qingdao Double Star Tire Industry Co., Ltd. | |
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| 中文摘要: |
| 在轮胎小侧偏角范围（±2°）内，应用线性分析法和多项式拟合曲线法对角度效应残余回正力矩（PRAT）和锥度效应残余回正力矩（CRAT）的测定数据进行分析，通过交叉验证法对1—9阶多项式拟合数据进行判断。结果表明，当侧偏角范围分别为±2°，±1°和±0.5°时，轮胎侧向力和回正力矩分别采用5阶多项式、3阶多项式和线性或2阶多项式拟合方差最小，可求得准确的PRAT和CRAT。 |
| 英文摘要: |
| In the rang of small slip angle（±2°） of the tire，the linear analysis method and the polynomial fitting curve method were used to analyze the measured data of the ply-steer residual aligning torque（PRAT） and the conicity residual aligning torque（CRAT）.The 1—9 order polynomial fitting data was judged by the cross-validation method.The results showed that when the slip angle range was ±2°，±1° and ±0.5°，the lateral force and the aligning torque of the tire were fitted by the fifth-order polynomial，the third-order polynomial and the linear or second-order polynomial respectively，the fitting variance was the smallest，and accurate PRAT and CRAT could be obtained. |
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