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Research Papers

Variable Structure Decentralized Control and Estimation for Highway Traffic Systems

[+] Author and Article Information
Rafael Becerril-Arreola

Department of Electrical and Computer Engineering, Concordia University, Montreal, QC, Canada, H3G 1M8becerril@control.utoronto.ca

Amir G. Aghdam

Department of Electrical and Computer Engineering, Concordia University, Montreal, QC, Canada, H3G 1M8aghdam@ece.concordia.ca

Rashid R. Kohan

Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada, M5S 3G4kohan@control.utoronto.ca

J. Dyn. Sys., Meas., Control 130(4), 041002 (Jun 04, 2008) (11 pages) doi:10.1115/1.2907389 History: Received October 23, 2005; Revised August 15, 2007; Published June 04, 2008

This work is concerned with the decentralized control of traffic flow in highways using on-ramp metering and variable structure techniques. Both the estimation and the robust control problem are studied. Sliding mode observers are first proposed to estimate the state of neighboring highway segments in a two-highway-link model. Two independent variable structure controllers use the resulting estimates to locally stabilize the traffic flow around a desired set point, even if accurate estimation is not always possible.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

The two highway links under consideration

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Figure 2

Domain of attraction of the controllers in (a) Link I and (b) Link II

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Figure 3

The state and its estimate under congested conditions

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Figure 4

The flow through the on-ramps under congested conditions

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Figure 5

The state and its estimate under noncongested conditions

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Figure 6

The flow through the on-ramps for noncongested conditions

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Figure 7

The state and its estimate when the on-ramp flow is limited

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Figure 8

The prescribed control signal when the on-ramp flow is limited

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