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基于运行数据的公交客车动力系统参数优化
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作者 赖辉平 郑正中 +2 位作者 王少杰 侯亮 苏亮 《汽车技术》 CSCD 北大核心 2023年第1期55-62,共8页
为使公交客车在载客量和工况多变的情况下发挥混合动力系统的节能潜力,提出了基于运行数据的混合动力客车动力系统参数优化方法。基于车联网数据,利用核主成分分析(KPCA)和粒子群优化(PSO)K均值聚类分析构建了具有代表性的某市公交客车... 为使公交客车在载客量和工况多变的情况下发挥混合动力系统的节能潜力,提出了基于运行数据的混合动力客车动力系统参数优化方法。基于车联网数据,利用核主成分分析(KPCA)和粒子群优化(PSO)K均值聚类分析构建了具有代表性的某市公交客车行驶工况;针对公交客车运营中乘客人数随机变化的特点,建立基于最优拉丁超立方设计(OptLHD)的混合动力客车动力系统参数双层优化模型,内层采用Opt-LHD产生乘客人数,采用发动机最优控制策略将系统响应传递至外层优化算法。仿真结果表明,优化后的动力系统参数对不确定因素有更强的适应性,燃油消耗量较优化前平均减少9.97%。 展开更多
关键词 动力系统参数优化 乘客人数 运行工况构建 最优拉丁超立方设计 混合动力客车
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Parameter optimization for improved aerodynamic performance of louver-type wind barrier for train-bridge system 被引量:16
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作者 HE Xu-hui FANG Dong-xu +1 位作者 LI Huan SHI Kang 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第1期229-240,共12页
To improve the safety of trains running in an undesirable wind environment,a novel louver-type wind barrier is proposed and further studied in this research using a scaled wind tunnel simulation with 1:40 scale models... To improve the safety of trains running in an undesirable wind environment,a novel louver-type wind barrier is proposed and further studied in this research using a scaled wind tunnel simulation with 1:40 scale models.Based on the aerodynamic performance of the train-bridge system,the parameters of the louver-type wind barrier are optimized.Compared to the case without a wind barrier,it is apparent that the wind barrier improves the running safety of trains,since the maximum reduction of the moment coefficient of the train reaches 58%using the louver-type wind barrier,larger than that achieved with conventional wind barriers(fence-type and grid-type).A louver-type wind barrier has more blade layers,and the rotation angle of the adjustable blade of the louver-type wind barrier is 90–180°(which induces the flow towards the deck surface),which is more favorable for the aerodynamic performance of the train.Comparing the 60°,90°and 120°wind fairings of the louver-type wind barrier blade,the blunt fairing is disadvantageous to the operational safety of the train. 展开更多
关键词 wind barrier aerodynamic force train-bridge system scaled wind tunnel simulation parameter optimization
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