汽车及零部件产品3C认证制度分析

文章介绍了汽车及零部件产品中国强制性产品认证制度,分析了新版规则下认证制度的改革重点,并对CCC认证的主要流程、发展现状以及存在的问题进行讨论。以某企业为例,重点分析了CCC认证实施的具体方法,并对零部件产品CCC改革及自我声明的相关政策进行解析,供汽车及零部件企业参考,以便顺利完成改革后的产品认证。     

Dynamics of connected vehicle systems with delayed acceleration feedback

In this paper, acceleration-based connected cruise control (CCC) is proposed to increase roadway traffic mobility. CCC is designed to be able to use acceleration signals received from multiple vehicles ahead through wireless vehicle-to-vehicle (V2V) communication. We consider various connectivity structures in heterogeneous platoons comprised of human-driven and CCC vehicles. We show that inserting a few CCC vehicles with appropriately designed gains and delays into the flow, one can stabilize otherwise string unstable vehicle platoons. Exploiting the flexibility of ad-hoc connectivity, CCC can be applied in a large variety of traffic scenarios. Moreover, using acceleration feedback in a selective manner, CCC provides robust performance and remains scalable for large systems of connected vehicles. Our conclusions are verified by simulations at the nonlinear level.