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Signal timing information is important in signal operations and signal/arterial performance measurement. Such information, however, may not be available for wide areas. This imposes difficulty, particularly for real-time signal/arterial performance measurement and traffic information provisions that have received much attention recently. We study, in this paper, the possibility of using intersection...
The fast moving of nodes will cause the frequent change of network topology which makes the data dissemination of VANET (Vehicular Ad-hoc Networks) challenging. This paper proposes a data dissemination strategy which is called the Adaptive Connectivity Data Dissemination Scheme (ACDDS), that is, the nodes calculate the network connectivity in current areas by the distributed nodes density perception...
A guaranteed cost control method for autonomous vehicle platoon with communication constraints (such as quantization, time-delay and packet-losses) is developed in this paper. Firstly, a vehicle model is established for the platoon's longitudinal movement, which is shown to be a great improvement of the existing models in that networked communication constraints are considered. Then, a guaranteed...
Effective incident management and traffic control measurements require a full understanding of the characteristics of incidents to accurately estimate incident durations and to help make more efficient decisions to reduce the impacts of non recurring congestion due to these accidents. The Incident duration includes four parts: detection time, response time, clearance time and recovery time. Many of...
The performance of a networked control system (NCS) is affected directly and indirectly by transmission time delays and data losses in the communications network. Based on the communications network model, this paper presents the validity of two different predictive control strategies and the study of the network effects on the lateral (guidance) control of an autonomous guided vehicle (AGV) in the...
The characteristics of ultra-wideband (UWB) channels in vehicular environments are explored. A set of propagation measurements were conducted on roadways and in underground parking garages and the resulting propagation data consists of approximately 1,200 multipath profiles. The channel impulse responses are estimated from the measured data using generalized maximum likelihood. The statistics of channel...
The performance of an networked control system (NCS) is affected directly and indirectly by transmission time delays and data losses in the communications network. This paper presents the modelling of main problems of a communications network in an NCS, and the study of their effects on the longitudinal (velocity) and lateral (guidance) control of an autonomous guide vehicle (AGV). The results are...
The performance of a networked control system (NCS) is affected directly and indirectly by transmission time delays and data losses in the communications network. Based on the communications network model, this paper presents two different control strategies and the study of network effects on the lateral (guidance) control of an autonomous guided vehicle (AGV) in the presence of sensor noise: bounded...
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