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Communication Dans Un Congrès Année : 2020

Event-triggered Varying Speed Limit Control of Stop-and-go Traffic

Résumé

This paper develops event-triggered boundary control strategies for varying speed limit (VSL) located at a freeway segment. The stop-and-go traffic oscillations are suppressed by regulating the velocity of vehicles that leave the segment. The controlled velocity signal is only updated when a event triggering condition is satisfied. Compared with the continuous input signal, the event-based controller presents as a more realistic setting to implement by VSL on a digital platform which allows the adaptation time for drivers to follow the advisory speed. The traffic dynamics of density and velocity are described with linearized Aw-Rascle-Zhang (ARZ) macroscopic traffic partial differential equation (PDE) model which results in a 2 × 2 coupled hyperbolic system. The event-triggered boundary controllers rely on the emulation of the full state backstepping boundary feedback and two different Lyapunov-based event-triggered strategies to determine the time instants at which the control value must be sampled/updated. One of the event-triggered strategies makes use of a dynamic triggering condition under which it is possible to state the existence of a uniform minimal dwell-time (independent of initial conditions). The exponential stability under event-triggered control is achieved and validated with numerical simulations.
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Dates et versions

hal-02931407 , version 1 (06-09-2020)

Identifiants

  • HAL Id : hal-02931407 , version 1

Citer

Nicolás Espitia, Huan Yu, Miroslav Krstic. Event-triggered Varying Speed Limit Control of Stop-and-go Traffic. IFAC World Congress 2020, Jul 2020, Berlin, Germany. ⟨hal-02931407⟩
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