Using the new technologies such as information technology, communication technology and electronic control technology, vehicle collision warning system（CWS） can acquire road condition, adjacent vehicle march conditi...Using the new technologies such as information technology, communication technology and electronic control technology, vehicle collision warning system（CWS） can acquire road condition, adjacent vehicle march condition as well as its dynamics performance continuously, then it can forecast the oncoming potential collision and give a warning. Based on the analysis of driver＇s driving behavior, algorithm＇s warning norms are determined. Based on warning norms adopting machine vision method, the cooperation collision warning algorithm（CWA） model with multi-input and multi-output is established which is used in supporting vehicle CWS. The CWA is tested using the actual data and the result shows that this algorithm can identify and carry out warning for vehicle collision efficiently, which has important meaning for improving the vehicle travel safety.展开更多
本文详细讨论了DSMC方法中流体温度、能量及边界热流的统计方法,发展了一种从边界热流求得与壁面碰撞分子反射速度的方法。该方法被称为逆温度抽样算法(ITS,Inverse Temperature Sampling)方法。在此基础上,本文发展了DSMC方法中壁面处...本文详细讨论了DSMC方法中流体温度、能量及边界热流的统计方法,发展了一种从边界热流求得与壁面碰撞分子反射速度的方法。该方法被称为逆温度抽样算法(ITS,Inverse Temperature Sampling)方法。在此基础上,本文发展了DSMC方法中壁面处给定热流边界条件的实施方法。计算结果表明: ITS方法能准确抽样反射分子的特征温度,进而求得分子反射速度。基于该方法的给定热流边界条件可以准确求得壁面处温度分布,以及流场内的压力、速度。展开更多
论文通过真实道路试验获得乘用车驾驶员特性试验数据,得到不同类型驾驶员跟车行为特性参数,提出了适应驾驶员特性的基于避撞时间TTC(Time to Collision)的报警算法,确定了报警-避撞启动逻辑,并且根据驾驶员异常行为的试验数据统计得到报...论文通过真实道路试验获得乘用车驾驶员特性试验数据,得到不同类型驾驶员跟车行为特性参数,提出了适应驾驶员特性的基于避撞时间TTC(Time to Collision)的报警算法,确定了报警-避撞启动逻辑,并且根据驾驶员异常行为的试验数据统计得到报警-避撞阈值。试验结果表明,所提出的追尾报警-避撞算法能够体现不同类型的驾驶员特性,有效提高汽车追尾报警-避撞系统的可接受性。展开更多
基金Sponsored by the Special Development Foundation of High School’s Doctor Subject of China (20030006007)
文摘Using the new technologies such as information technology, communication technology and electronic control technology, vehicle collision warning system（CWS） can acquire road condition, adjacent vehicle march condition as well as its dynamics performance continuously, then it can forecast the oncoming potential collision and give a warning. Based on the analysis of driver＇s driving behavior, algorithm＇s warning norms are determined. Based on warning norms adopting machine vision method, the cooperation collision warning algorithm（CWA） model with multi-input and multi-output is established which is used in supporting vehicle CWS. The CWA is tested using the actual data and the result shows that this algorithm can identify and carry out warning for vehicle collision efficiently, which has important meaning for improving the vehicle travel safety.
文摘本文详细讨论了DSMC方法中流体温度、能量及边界热流的统计方法,发展了一种从边界热流求得与壁面碰撞分子反射速度的方法。该方法被称为逆温度抽样算法(ITS,Inverse Temperature Sampling)方法。在此基础上,本文发展了DSMC方法中壁面处给定热流边界条件的实施方法。计算结果表明: ITS方法能准确抽样反射分子的特征温度,进而求得分子反射速度。基于该方法的给定热流边界条件可以准确求得壁面处温度分布,以及流场内的压力、速度。
文摘论文通过真实道路试验获得乘用车驾驶员特性试验数据,得到不同类型驾驶员跟车行为特性参数,提出了适应驾驶员特性的基于避撞时间TTC(Time to Collision)的报警算法,确定了报警-避撞启动逻辑,并且根据驾驶员异常行为的试验数据统计得到报警-避撞阈值。试验结果表明,所提出的追尾报警-避撞算法能够体现不同类型的驾驶员特性,有效提高汽车追尾报警-避撞系统的可接受性。
