城市公交车行驶况的构建.pdf

城市公交车行驶工况的构建 摘 要 车辆行驶工况主要用于评价车辆及发动机经济性能和排放性能。鉴于车辆 保有量的增加给交通和环境带来极大的压力，政府部门大力倡导公共交通系统， 因此构建城市公交车行驶工况具有重要意义。 车辆行驶工况主要用于评价车辆及发动机经济性能和排放性能。鉴于车辆 保有量的增加给交通和环境带来极大的压力，政府部门大力倡导公共交通系统， 因此构建城市公交车行驶工况具有重要意义。 本文以合肥市的道路及公交车运行为研究对象，经过交通调查，运用交通 研究领域的“路段频度和覆盖率”的概念，选取了 4 条具有较高覆盖率代表性 的公交线路。基于这些试验线路，通过实车数据采集，获得大量的公交车道路 实际运行数据。 在从试验数据到“行驶工况”构建的过程中，运用短行程的概念，将试验 数据分割成 300 多个短行程，求出了表征公开的运行特征如速度、加速度、加 速度标准差等 33 个短行程特征参数值，并对他们进行了描述分析。 运用主成分分析和聚类分析等多元统计分析工具将短行程分为两类。对两 类短行程的分析表明，第一类短行程代表交通堵塞状况下，第二类短行程代表 交通顺畅状况下。从而构建合肥市堵塞道路、顺畅道路以及综合行驶工况。通 过有效性的判断，结果表明构建的工况能够代表试验数据工况。 关键词：公交车；行驶工况；短行程；主成分分析；聚类分析 The City Bus Driving Cycle Construction Abstract Driving Cycle is mainly applied on the evaluation of the vehicle and engine performance. The increase of vehicles has brought great pressure to the transportation and the environment, and government departments vigorously advocate the public transportation systems. So it has great significance to construct the city bus driving cycle . This paper is taking its bus operation and the road of Hefei city as object of research via detailed, thorough traffic investigation, utilize the concept of “the coverage rate and frequency of section of a highway or railway” of traffic research field ，has made out four represented operation lines with higher coverage rate. Based on these lines, through on-bus data collection ，have gotten magnanimity abundant bus road actual operation data. When conceived driving cycles from original data, domestically have utilized the concept of short trip. Test research cuts original data apart into the short trips more than 300, have calculated the 33 short trip eigenvalues that image operation feature of driving cycles such as speed , acceler