The invention belongs to the technical field of automobiles, and particularly relates to an automobile mass and gradient real-time estimation method based on a data confidence factor. Comprising the steps of 1, obtaining vehicle driving state data; 2, establishing a relation model of the whole vehicle mass, the road gradient and the vehicle driving state data based on the vehicle dynamics model; 3, working condition characteristic parameters are calculated through the vehicle driving state data and the vehicle inherent parameters; 4, establishing a quality estimation confidence factor model based on a neural network algorithm; 5, estimating the mass of the vehicle based on a least square method of a confidence factor; 6, judging whether the quality estimation value is stable or not; and 7, estimating the road gradient based on an extended Kalman filtering algorithm. According to the method, the limitation of traditional dynamic model-based mass estimation on vehicle working conditions is broken through, and decoupling of vehicle mass and road slope estimation is realized according to the measurement principle of the vehicle dynamic model and the vehicle-mounted acceleration sensor, so that the accuracy of estimation values of the vehicle mass and the road slope is improved.
本发明属于汽车技术领域,具体的说是一种基于数据置信度因子的汽车质量与坡度实时估计方法。包括:一、获取车辆行驶状态数据;二、基于车辆动力学模型建立整车质量、道路坡度与车辆行驶状态数据的关系模型;三、利用车辆行驶状态数据和车辆固有参数计算工况特征参数;四、基于神经网络算法建立质量估计置信度因子模型;五、基于置信度因子的最小二乘法估计车辆质量;六、判断质量估计值是否稳定;七、基于扩展卡尔曼滤波算法估计道路坡度。本发明打破了传统基于动力学模型估计质量对于车辆工况的局限性,根据车辆动力学模型和车载加速度传感器的测量原理,实现了车辆质量和道路坡度估计的解耦,从而提高二者估计值的准确性。
Automobile mass and gradient real-time estimation method based on data confidence factor
一种基于数据置信度因子的汽车质量与坡度实时估计方法
2023-09-01
Patent
Elektronische Ressource
Chinesisch
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 / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen |
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