排序方式: 共有29条查询结果,搜索用时 15 毫秒
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Transportation - This study anticipates changes in U.S. highway and rail trade patterns following widespread availability of self-driving or autonomous trucks (Atrucks). It uses a... 相似文献
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车辆在实际道路上的排放情况不同于试验室的测试结果,文章引入PEMS设备进行车辆道路排放测试。PEMS工作的稳定性、精确性和灵敏度使其能成功地用于道路测试。通过将PEMS应用到实际的在用车道路排放测试中,具体分析了道路环境对车辆排放的影响。 相似文献
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Yufeng Lian Xiaoyu Wang Yantao Tian Keping Liu 《International Journal of Automotive Technology》2018,19(2):331-343
This paper presents a new control scheme for lateral collision avoidance (CA) systems to improve the safety of four-in-wheel-motor-driven electric vehicles (FIWMD-EVs). There are two major contributions in the design of lateral CA systems. The first contribution is a new lane-changing model based on vehicle edge turning trajectory (VETT) to make vehicle adapt to different driving roads and conform to drivers’ characteristic, in addition to ensure vehicle steering safety. The second contribution is vehicle semi-uncertainty dynamic model (SUDM), which is SISO model. The problem of stability performance without the information on sideslip angle is solved by the proposed SUDM. Based on the proposed VETT and SUDM, the lateral CA system can be designed with H∞ robust controller to restrain the effect of uncertainties resulting from parameter perturbation and lateral wind disturbance. Single and mixed driving cycles simulation experiments are carried out with CarSim to demonstrate the effectiveness in control scheme, simplicity in structure for lateral CA system based on the proposed VETT and SUDM. 相似文献
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针对放电过程中,锂离子电池生热和散热问题,利用有限元分析软件ANSYS/Fluent,模拟分析锂离子电池在不同对流换热系数和不同放电倍率条件下的三维温度场分布情况。结果表明,锂离子电池温度场分布情况与对流换热系数和放电倍率存在一定关系。 相似文献
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在我国城市建设中,随着城市岩溶富水隧道的修建,岩溶富水隧道的帷幕注浆技术在城市隧道施工中得到了广泛运用。但在岩溶富水隧道施工中,由于对不良地质的超前预报是有限的,当前采用的帷幕注浆具有一定的探索性和盲目性。为了加强对帷幕注浆的指导性和可控性,进行动水动态信息化施工技术的研究是必要的。动水动态信息化注浆设计、施工技术的核心体现在:信息化注浆模型地质数据的更新;注浆方案的优化;现场动态控制。文章介绍了中梁山隧道岩溶富水段帷幕注浆的施工情况,研究分析了帷幕注浆动水动态信息化施工的技术特点和运用效果。 相似文献
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文章分析了影响舰炮武器系统射击精度的几个因素,并以某型舰炮为例,利用典型数据对立靶密集度与命中概率的关系进行了仿真计算,总结了舰炮立靶密集度指标与系统精度的关系。 相似文献
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