Cooperative adaptive cruise control : tradeoffs between control and network specifications

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Abstract

In this study, we consider a Cooperative Adaptive Cruise Control (CACC) system which regulates inter-vehicle distances in a vehicle string. Improved performance can be achieved by utilizing information exchange between vehicles through wireless communication besides local sensor measurements. However, wireless communication introduces network-induced effects that may compromise the performance of the CACC system. Therefore, we approach the design of a CACC system from a Networked Control System (NCS) perspective. Network-induced imperfections in a NCS are mainly due to limited bandwidth of the network, multiple nodes sharing the same medium, and other limitations such as transmission delays and losses. Tradeoffs between CACC performance and network speci¿cations need to be made for achieving desired performance under these network-induced constraints. In this paper, we present a NCS modelling framework that incorporates the effect of sample-and-hold and network delays that occur due to wireless communication. Moreover, we employ this model to study the so-called string stability performance of the string in which vehicles are interconnected by a vehicle following control law and a constant time headway spacing policy. Speci¿cally, we study how string stability is affected by network-induced effects such as delays.
Original languageEnglish
Title of host publicationProceedings of the 14th International IEEE Conference on Intelligent Transportation Systems, 05-07 October 2011, Washington, DC
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages2051-2056
ISBN (Print)978-1-4577-2198-4
DOIs
Publication statusPublished - 2011
Event14th International IEEE Conference on Intelligent Transportation Systems (ITSC 2011) - Washington, United States
Duration: 5 Oct 20117 Oct 2011
Conference number: 14

Conference

Conference14th International IEEE Conference on Intelligent Transportation Systems (ITSC 2011)
Abbreviated titleITSC 2011
Country/TerritoryUnited States
CityWashington
Period5/10/117/10/11

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