| 邱昌峰,陈仁全,刘俊杰,孙向阳.小侧偏角下轮胎残余回正力矩算法的研究[J].轮胎工业,2019,39(7):0443-0446 |
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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 |
| 投稿时间：2018-08-24 修订日期：2018-08-24 |
| 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 |
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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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