基于二次预测型横向载荷转移率的汽车侧翻预警研究  

Research on Vehicle Rollover Warning Based on Secondary Predictive Lateral Load Transfer Ratio

作　　者：金智林[1,2] 严正华 JIN Zhilin;YAN Zhenghua(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing, 210016;Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing,400054)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《中国机械工程》2019年第15期1790-1795,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51775269);中国博士后基金资助项目(2017M610326);汽车零部件先进制造技术教育部重点实验室开放课题资助项目(2016KLMT05)

摘　　要：准确预警可有效降低车辆侧翻事故。针对汽车侧翻预警算法的模型复杂度和预警精度之间存在矛盾的问题,提出了一种基于二次预测型横向载荷转移率的汽车侧翻预警方法。以某运动型多功能汽车为研究对象,建立了线性三自由度汽车侧翻动力学模型;应用汽车侧翻动力学理论,计算了横向载荷转移率及其一次变化率和二次变化率,求得了基于二次预测型横向载荷转移率的汽车侧翻预警时间的解析解;对高速紧急工况下运动型多功能汽车的绊倒型及非绊倒型侧翻过程进行实例仿真,结果表明,提出的基于二次预测型横向载荷转移率的汽车预警算法预警结果准确,可提高汽车侧翻的预警精度,能有效改善汽车防侧翻的主动安全性能。Accurate warning might effectively reduce vehicle rollover accidents. To solve the contradiction between model complexity and warning accuracy of algorithm of vehicle rollover warning, a rollover warning method based on secondary predictive lateral load transfer ratio for vehicles was proposed herein. A linear three-degrees-of-freedom dynamics model of sport utility vehicle(SUV) rollovers was established to calculate the lateral load transfer ratio, the primary predictive lateral load transfer ratio, and the secondary predictive lateral load transfer ratio using the dynamics theory of vehicle rollovers. Then, the theoretical solution of time to rollover of the vehicles was deduced from the secondary predictive lateral load transfer ratio. Furthermore, the characteristics of time to rollover(TTR) were demonstrated by simulations of SUV at high-speed under both tripped and untripped rollover conditions. The results show that the proposed rollover warning method based on the secondary predictive lateral load transfer ratio may accurately calculate TTR. Therefore, the active safety of vehicle rollover prevention may effectively be improved.

关 键 词：汽车侧翻 二次预测横向载荷转移率 侧翻预警时间 绊倒型侧翻 主动安全 

分 类 号：U461.91[机械工程—车辆工程]