The invention provides an active collision avoidance method and system and an automobile, and belongs to the technical field of intelligent traffic and unmanned driving. The automobile longitudinal dynamic models comprise an engine model, a hydraulic torque converter model, an automatic transmission model and a whole automobile mass model; information such as the relative distance and the relative speed between the rear vehicle and the front vehicle, the speed and the acceleration of the rear vehicle, the speed and the acceleration of the front vehicle, the vehicle width and the transverse angle is obtained through a radar sensor of the rear vehicle, and the distance needing to be kept between the front vehicle and the rear vehicle is calculated through a safety distance model according to the information and compared with the actual vehicle distance; when the actual vehicle distance is smaller than the safe distance in the collision avoidance system, the vehicle will be in a dangerous condition, a driver needs to conduct braking operation, if the driver does not execute the braking operation, the active collision avoidance system directly closes a throttle valve of the vehicle, braking is started, and therefore rear-end collision accidents are avoided.
本发明提供一种主动避撞方法、系统及汽车,属于智慧交通及无人驾驶技术领域,本发明对汽车传动结构的动力学公式进行了简化;发动机模型,液力变矩器模型,自动变速器模型和整车质量模型的汽车纵向动力学模型;通过后车的雷达传感器获取后车与前车的相对距离,相对速度,后车速度、加速度,前车速度、加速度,车宽、横向角等信息,安全距离模型根据这些信息计算出前后车需要保持的距离并将其与实际的车辆距离做比较;当实际的车辆距离小于避撞系统中的安全距离时,车辆本身将会处于危险的状况,需要驾驶员进行制动的操作,如果驾驶员并没有执行制动的操作,主动避撞系统直接关闭车辆的节气门,并且开始制动,从而避免追尾事故的发生。
Active collision avoidance method and system and automobile
主动避撞方法、系统及汽车
2022-08-09
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 |