Fault classification method for the driving safety of electrified vehicles

A fault classification method is proposed which has been applied to an electric vehicle. Potential faults in the different subsystems that can affect the vehicle directional stability were collected in a failure mode and effect analysis. Similar driveline faults were grouped together if they resembled each other with respect to their influence on the vehicle dynamic behaviour. The faults were physically modelled in a simulation environment before they were induced in a detailed vehicle model under normal driving conditions. A special focus was placed on faults in the driveline of electric vehicles employing in-wheel motors of the permanent magnet type. Several failures caused by mechanical and other faults were analysed as well. The fault classification method consists of a controllability ranking developed according to the functional safety standard ISO 26262. The controllability of a fault was determined with three parameters covering the influence of the longitudinal, lateral and yaw motion of the vehicle. The simulation results were analysed and the faults were classified according to their controllability using the proposed method. It was shown that the controllability decreased specifically with increasing lateral acceleration and increasing speed. The results for the electric driveline faults show that this trend cannot be generalised for all the faults, as the controllability deteriorated for some faults during manoeuvres with low lateral acceleration and low speed. The proposed method is generic and can be applied to various other types of road vehicles and faults.     

基于UG的标准零件库管理系统界面开发的关键技术

在课题的开发过程中,作者编写了符合ISO13584中PLIB标准的机械类国家标准件的EXPRESS几何图形程序,通过转换器,可以将这些几何图形程序自动地转换为GRIP绘图程序.     

对运输企业推行ISO 9000质量体系认证的探讨

在运输管理工作中引入ISO 9000标准将使运输管理更科学化、系统化、文件化、制度化,能全面提升管理水平。     

ISO与BSRA航速修正方法计算实例分析

介绍了ISO与BSRA航速修正方法,并通过采用ISO和BSRA航速修正方法分别对计算实例进行航速修正,得出ISO修正方法可以获得更高的航速指标,并对ISO航速修正方法的合理性和适用性提出建议。     

基于ITTC的实船试航航速修正方法

依据ITTC 7.5-04-01-01.2,并结合ISO 15016（2002）中关于实船试航航速修正方法,以EXCEL为平台,通过VBA编写程序,建立了一种考虑风、波浪、水温、航行状态和浅水等影响因素的船舶试航航速修正方法,可以快捷方便地对试航航速进行修正,得到深水、无风、无浪、无流条件下的船舶航速、主机功率、螺旋桨转速及相应压载吃水和结构吃水工况下的S-P曲线。最后将软件应用于某散货船实船航速修正中,经对比分析表明其修正结果与船模试验的变化趋势是一致的。     

对企业ISO9000质量体系运行有效性的探讨

如何保证质量管理体系的有效运行是企业获得认证后一个不能回避的课题,文章介绍了评价质量管理体系的有效性的关键因素,提出了保持质量管理体系有效性的切实措施。     

高职院校引入ISO9000质量管理体系的研究

高等职业教育为适应经济全球化、科技现代化和教育国际化需要，应融入世界科技与经济发展之中。特别是我国加入WTO后，高职院校只有不断完善其教育培训服务质量管理体系，提高教育培训服务质量和管理水平，并建立科学的质量监控体系和评价体系，才能达到全面推进素质教育的目的，也才可以在激烈的教育产业市场竞争中得到生存和发展。本文阐述了高职院校引入ISO9000质量标准体系的可行性和必要性，介绍了ISO9000质量标准体系的主要理念，提出了高职院校质量管理体系的设计。     

乡镇企业贯标认证的经验

端正认识;领导重视、全员参与;培训骨干;加强考核;加强管理评审和内审频率,这几点是乡镇企业贯标认证工作的关键。     

ISO14000与东风汽车公司的经营发展

ISO1 4 0 0 0是国际标准组织为保护全球环境 ,促进世界经济持续发展 ,针对全球企业、政府部门、非盈利性团体和其它用户而制定的一系列环境管理国际标准。实施 ISO1 4 0 0 0系列标准会促使东风汽车公司把握机遇 ,乘势发展 ,消除国际贸易壁垒 ,从而获取竞争优势。公司应尽快地实施 ISO1 4 0 0 0     

“一岗两责”源自ISO 9000的管理创新

本文通过对永济电机厂“一岗两责”管理的介绍和分析 ,为企业管理创新介绍一种新的思路 ,并以此希望能促进企业管理创新的发展。