The invention provides a vehicle weight estimation method and device, and the method comprises the steps: determining the average acceleration and the current slope information of a road surface according to the vehicle driving information in a current time window for each time window meeting a preset working condition driving requirement; wherein the vehicle driving information comprises a first vehicle speed at the starting moment of the current time window; the current wheel end driving force of the vehicle is determined according to the power assembly information of the vehicle; according to the vehicle weight nominal value, the current wheel end driving force and the average acceleration, equivalent wheel end driving force is determined; looking up a driving force comparison table by using the current gradient information and the first vehicle speed to obtain a group of reference wheel end driving forces, and determining an input discourse domain in fuzzy logic based on the reference wheel end driving forces; and according to the current slope information and the equivalent wheel end driving force, defuzzification processing is carried out in the determined input discourse domain in the fuzzy logic, and the current estimated vehicle weight of the target vehicle is determined. Therefore, by calculating the equivalent wheel end driving force and adopting the fuzzy logic to carry out discretization estimation on the vehicle weight, the accuracy and the stability of a vehicle weight determination result can be effectively improved.
本申请提供了一种车重估计方法及装置,包括:针对每个符合预设工况行驶要求的时间窗口,根据当前时间窗口内的车辆行驶信息,确定平均加速度以及路面的当前坡度信息;其中,车辆行驶信息中包括当前时间窗口起始时刻的第一车速;根据车辆的动力总成信息进确定车辆的当前轮端驱动力;根据车辆车重标称值、当前轮端驱动力以及平均加速度,确定等效轮端驱动力;利用当前坡度信息和第一车速,对驱动力对照表进行查表,获取一组参考轮端驱动力,并基于参考轮端驱动力,确定模糊逻辑当中的输入论域;根据当前坡度信息和等效轮端驱动力,在确定出的模糊逻辑当中的输入论域内进行去模糊化处理,确定所述目标车辆的当前估计车重。这样,通过计算等效轮端驱动力,并采用模糊逻辑对车重进行离散化估计,可有效提高车重确定结果的精确度和稳定性。
Vehicle weight estimation method and device
一种车重估计方法及装置
2024-08-16
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 |
ELECTRIC VEHICLE WEIGHT ESTIMATION DEVICE AND WEIGHT ESTIMATION METHOD
European Patent Office | 2020
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