The invention relates to a vehicle stability judgment method based on a phase plane method and driver data, which comprises the following steps: quantifying the driving style and driving ability of a driver according to the driver data, and establishing a driving risk coefficient by considering the influence value of the longitudinal acceleration of a vehicle; establishing a stable region coefficient database and a stable region coefficient fitting function of a side slip angle-yaw velocity phase plane graph through a nonlinear vehicle model; according to the road adhesion coefficient, the steering wheel turning angle and the longitudinal vehicle speed at a certain moment, the instability and the stable area matching coefficient are calculated; and judging the stability of the vehicle by combining the driving risk coefficient, the stable region matching coefficient and the instability. On the basis of a traditional phase plane vehicle stability judgment method, the influences of the driving style of a driver, the driving ability and the longitudinal acceleration of the vehicle are further considered, the precision of the stable area obtained through the database is improved in combination with the fitting function of the stable area coefficient, and a set of vehicle stability judgment process is created.
本发明涉及一种基于相平面法及驾驶员数据的车辆稳定性判断方法,包括根据驾驶员数据量化驾驶员驾驶风格、驾驶能力,考虑车辆纵向加速度的影响值建立驾驶风险系数;通过非线性车辆模型建立质心侧偏角‑横摆角速度相平面图稳定区域系数数据库和稳定区域系数拟合函数;根据某一时刻的路面附着系数、方向盘转角、纵向车速计算不稳定度、稳定区域吻合系数;结合驾驶风险系数、稳定区域吻合系数、不稳定度判断车辆稳定性。本发明在传统的相平面车辆稳定性判断方法的基础上进一步考虑了驾驶员驾驶风格、驾驶能力以及车辆纵向加速度的影响,结合稳定区域系数的拟合函数提高了通过数据库获得的稳定区域的精度,创建了一套车辆稳定性判断流程。
Vehicle stability judgment method based on phase plane method and driver data
一种基于相平面法及驾驶员数据的车辆稳定性判断方法
2023-06-23
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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