The invention provides a vehicle weight estimation method and system, and belongs to the field of vehicles. The method comprises the following steps: acquiring the longitudinal acceleration, the lateral acceleration and the vertical acceleration of a vehicle through a six-axis sensor; acquiring driving torque and vehicle speed when the vehicle is in a constant-speed state and an acceleration staterespectively; calculating a first driving force according to the driving torque and the vehicle speed when the vehicle is in a constant-speed state; calculating a second driving force according to the driving torque and the vehicle speed when the vehicle runs on a road with a fixed slope and is in an acceleration state, and calculating a wind resistance increment; calculating an external force resultant force when the vehicle is in an acceleration state according to the first driving force, the second driving force and the wind resistance increment; calculating the longitudinal component force of the vehicle according to the longitudinal acceleration, the lateral acceleration, the vertical acceleration and the external force resultant force when the vehicle is in the acceleration state; and estimating the mass of the vehicle according to the longitudinal component and the longitudinal acceleration. The vehicle weight estimation method of the invention has few limited conditions and can ensure the accuracy of the estimated vehicle weight.
本发明提供了一种车辆重量估算方法及系统,属于车辆领域。该方法包括:通过六轴传感器采集车辆的纵向加速度、侧向加速度和垂向加速度;采集车辆分别处于匀速状态和加速状态时的驱动扭矩和车速;根据车辆处于匀速状态时的驱动扭矩和车速计算第一驱动力;根据车辆在坡度固定的道路行驶且处于加速状态时的驱动扭矩和车速计算第二驱动力,同时计算风阻增量;根据第一驱动力、第二驱动力和风阻增量计算车辆处于加速状态时的外力合力;根据纵向加速度、侧向加速度、垂向加速度和车辆处于加速状态时的外力合力计算车辆的纵向分力;根据纵向分力和纵向加速度估算车辆的质量。本发明的车辆重量估算方法受限条件少并且能够保证所估算的车辆重量的准确性。
Vehicle weight estimation method and system
一种车辆重量估算方法及系统
07.08.2020
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 |
ELECTRIC VEHICLE WEIGHT ESTIMATION DEVICE AND WEIGHT ESTIMATION METHOD
Europäisches Patentamt | 2020
|Adaptive vehicle weight estimation
TIBKAT | 1998
|