Development of a simulation platform for safety impact analysis considering vehicle dynamics,sensor errors,and communication latencies: Assessing cooperative adaptive cruise control under cyber attack

While safety is one of the most critical contributions of Cooperative Adaptive Cruise Control (CACC), it is impractical to assess such impacts in a real world. Even with simulation, many factors including vehicle dynamics, sensor errors, automated vehicle control algorithms and crash severity need to be properly modeled. In this paper, a simulation platform is proposed which explicitly features: (i) vehicle dynamics; (ii) sensor errors and communication delays; (iii) compatibility with CACC controllers; (iv) state-of-the-art predecessor leader following (PLF) based cooperative adaptive cruise control (CACC) controller; and (v) ability to quantify crash severity and CACC stability. The proposed simulation platform evaluated the CACC performance under normal and cybersecurity attack scenarios using speed variation, headway ratio, and injury probability. The first two measures of effectiveness (MOEs) represent the stability of CACC platoon while the injury probability quantifies the severity of a crash. The proposed platform can evaluate the safety performance of CACC controllers of interest under various paroxysmal or extreme events. It is particularly useful when traditional empirical driver models are not applicable. Such situations include, but are not limited to, cyber-attacks, sensor failures, and heterogeneous traffic conditions. The proposed platform is validated against data collected from real field tests and tested under various cyber-attack scenarios.     

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大众“3L”路波轿车是一种以极低的燃料消耗实现全功能装备、满足各种使用要求的车辆，它装备1．2L带进气冷却并采用整体式喷油器技术的涡轮增压TDI柴油机；采用二级尾气催化率装置；在其变速器结构和控制模式方面采用了诸多新技术，通过CAN数据总线实现变速器控制与发动机控制相关联。为了最大限度地降低燃料消耗量，路波轿车在车身、桥等零部件中采用了轻型材料，并利用先进的制造工艺进行生产，这一车型已成为大众公司最具创意的产品之一。     

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磁悬浮轨道梁设计对全线运营质量和造价具有关键作用,在研究德国EmslabdS试验线主要轨道梁型的基础上,上海磁悬浮列车运营线采用钢混凝土复合梁、钢复合梁,桥上轨道梁结构等形式。设计参数满足运营安全和舒适度要求,变形要求竖向小于等于梁长的1/4800,上下温差引起的挠度小于等于梁长的1/6500,制造误差小于2mm,道岔钢梁采用箱型断面,侧向过岔最大速度为196km·h-1。目前,已经完成轨道梁和道岔的制作与铺设。     

技术标准体系与市场准入基础知识(2)

本讲座分3部分刊出。第二讲介绍市场准入基本概念,技术性贸易壁垒协议(WTO/TBT协议)中的主要概念;欧盟市场准入概况,北美市场准入概况,韩国市场准入概况,欧美铁路市场准入概况;中国市场准入制度。     

CL3.6型犁式除雪装置的开发研制

ＣＬ３．６型犁式除雪装置是以各类型装载机为依托开发研制的，在吉林省高速公路除雪作业中表现出了较好的除雪性能。其结构简单、功能齐全、经济实用、适合国情，易于大面积推广应用。     

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