A reference vehicle speed calculation method and system belong to the field of vehicle speed calculation, and comprise the following steps: when a vehicle is judged to be in a driving working condition currently, if a first difference value between a third wheel speed at the current moment and a reference vehicle speed at the previous moment is not greater than a first threshold value, judging that the vehicle enters a driving steady state; the fourth wheel speed at the current moment is selected as the reference vehicle speed at the current moment, and if the first difference value is larger than a first threshold value, it is judged that the vehicle enters the quasi-full-slip state; after it is judged that the vehicle enters the quasi-full-slip state, the reference vehicle speed at the current moment is obtained by accumulating the acceleration of the whole vehicle based on the reference vehicle speed integral at the previous moment, and when the calculated reference vehicle speed is not smaller than the fourth wheel speed at the current moment and smaller than the first wheel speed at the current moment, the vehicle is started; and selecting the fourth wheel speed at the current moment as the reference vehicle speed at the current moment. The accurate reference vehicle speed of the whole vehicle can be obtained.
一种参考车速计算方法及系统,属于车速计算领域,包括在判断车辆当前为驱动工况时,在判断车辆当前为驱动工况时,若当前时刻的第三轮速与前一时刻的参考车速的第一差值不大于第一阈值,则判断车辆进入驱动稳态,选择当前时刻的第四轮速作为当前时刻的参考车速,若所述第一差值大于第一阈值,则判断车辆进入准全打滑状态;在判断车辆进入准全打滑状态后,基于前一时刻的参考车速积分累加整车加速度得到当前时刻的参考车速,并在计算得到的参考车速不小于当前时刻的第四轮速且小于当前时刻的第一轮速时,选择当前时刻的第四轮速作为当前时刻的参考车速。本申请能够获取整车准确的参考车速。
Reference vehicle speed calculation method and system
一种参考车速计算方法及系统
2024-06-21
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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