Purpose–To support the standardized evaluation of bicyclist automatic emergency braking(AEB)systems,test scenarios,test procedures and test system hardware and software tools have been investigated and developed by t...Purpose–To support the standardized evaluation of bicyclist automatic emergency braking(AEB)systems,test scenarios,test procedures and test system hardware and software tools have been investigated and developed by the Transportation Active Safety Institute(TASI)at Indiana University-Purdue University Indianapolis.This paper aims to focus on the development of test scenarios and bicyclist surrogate for evaluating vehicle–bicyclist AEB systems.Design/methodology/approach–The harmonized general estimates system(GES)/FARS 2010-2011 crash data and TASI 110-car naturalistic driving data(NDD)are used to determine the crash geometries and environmental factors of crash scenarios including lighting conditions,vehicle speeds,bicyclist speeds,etc.A surrogate bicyclist including a bicycle rider and a bicycle surrogate is designed to match the visual and radar characteristics of bicyclists in the USA.A bicycle target is designed with both leg pedaling and wheel rotation to produce proper micro-Doppler features and generate realistic motion for camera-based AEB systems.Findings–Based on the analysis of the harmonized GES/FARS crash data,five crash scenarios are recommended for performance testing of bicyclist AEB systems.Combined with TASI 110-car naturalistic driving data,the crash environmental factors including lighting conditions,obscuring objects,vehicle speed and bicyclist speed are determined.The surrogate bicyclist was designed to represent the visual and radar characteristics of the real bicyclists in the USA.The height of the bicycle rider mannequin is 173 cm,representing the weighted height of 50th percentile US male and female adults.The size and shape of the surrogate bicycle were determined as 26-inch wheel and mountain/road bicycle frame,respectively.Both leg pedaling motion and wheel rotation are suggested to produce proper micro-Doppler features and support the camera-based AEB systems.Originality/value–The results have demonstrated that the developed scenarios,test procedures and bicyclist surrogate will provide effective objective methods and necessary hardware and software tools for the evaluation and validation of bicyclist AEB systems.This is crucial for the development of advanced driver assistance systems.展开更多
为满足复兴号系列中国标准动车组大批量生产需求,简化测试人员操作,依据牵引控制单元(Traction Control Unit,TCU)例行试验项点,并参考原手动测试台测试原理,设计研发了一套牵引控制单元自动化测试系统。该自动化测试系统硬件以PXI测控...为满足复兴号系列中国标准动车组大批量生产需求,简化测试人员操作,依据牵引控制单元(Traction Control Unit,TCU)例行试验项点,并参考原手动测试台测试原理,设计研发了一套牵引控制单元自动化测试系统。该自动化测试系统硬件以PXI测控计算机为核心,配合外部测量设备和信号产生设备;测试序列使用LabVIEW语言编程;为减少测试时间,充分利用多核CPU资源,对测试序列进行并行化处理。该自动化测试系统已在复兴号350公里中国标准动车组TCU上进行了验证,测试结果表明该测试系统能大幅缩减测试时间、准确识别故障点、实现测试报告的自动生成,具有较强的可靠性和实用性。展开更多
文摘Purpose–To support the standardized evaluation of bicyclist automatic emergency braking(AEB)systems,test scenarios,test procedures and test system hardware and software tools have been investigated and developed by the Transportation Active Safety Institute(TASI)at Indiana University-Purdue University Indianapolis.This paper aims to focus on the development of test scenarios and bicyclist surrogate for evaluating vehicle–bicyclist AEB systems.Design/methodology/approach–The harmonized general estimates system(GES)/FARS 2010-2011 crash data and TASI 110-car naturalistic driving data(NDD)are used to determine the crash geometries and environmental factors of crash scenarios including lighting conditions,vehicle speeds,bicyclist speeds,etc.A surrogate bicyclist including a bicycle rider and a bicycle surrogate is designed to match the visual and radar characteristics of bicyclists in the USA.A bicycle target is designed with both leg pedaling and wheel rotation to produce proper micro-Doppler features and generate realistic motion for camera-based AEB systems.Findings–Based on the analysis of the harmonized GES/FARS crash data,five crash scenarios are recommended for performance testing of bicyclist AEB systems.Combined with TASI 110-car naturalistic driving data,the crash environmental factors including lighting conditions,obscuring objects,vehicle speed and bicyclist speed are determined.The surrogate bicyclist was designed to represent the visual and radar characteristics of the real bicyclists in the USA.The height of the bicycle rider mannequin is 173 cm,representing the weighted height of 50th percentile US male and female adults.The size and shape of the surrogate bicycle were determined as 26-inch wheel and mountain/road bicycle frame,respectively.Both leg pedaling motion and wheel rotation are suggested to produce proper micro-Doppler features and support the camera-based AEB systems.Originality/value–The results have demonstrated that the developed scenarios,test procedures and bicyclist surrogate will provide effective objective methods and necessary hardware and software tools for the evaluation and validation of bicyclist AEB systems.This is crucial for the development of advanced driver assistance systems.
文摘为满足复兴号系列中国标准动车组大批量生产需求,简化测试人员操作,依据牵引控制单元(Traction Control Unit,TCU)例行试验项点,并参考原手动测试台测试原理,设计研发了一套牵引控制单元自动化测试系统。该自动化测试系统硬件以PXI测控计算机为核心,配合外部测量设备和信号产生设备;测试序列使用LabVIEW语言编程;为减少测试时间,充分利用多核CPU资源,对测试序列进行并行化处理。该自动化测试系统已在复兴号350公里中国标准动车组TCU上进行了验证,测试结果表明该测试系统能大幅缩减测试时间、准确识别故障点、实现测试报告的自动生成,具有较强的可靠性和实用性。
