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Nonlinear dynamics of autonomous vehicles with limits on acceleration

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  • Davis, L.C.

Abstract

The stability of autonomous vehicle platoons with limits on acceleration and deceleration is determined. If the leading-vehicle acceleration remains within the limits, all vehicles in the platoon remain within the limits when the relative-velocity feedback coefficient is equal to the headway time constant [k=1/h]. Furthermore, if the sensitivity α>1/h, no collisions occur. String stability for small perturbations is assumed and the initial condition is taken as the equilibrium state. Other values of k and α that give stability with no collisions are found from simulations. For vehicles with non-negligible mechanical response, simulations indicate that the acceleration-feedback-control gain might have to be dynamically adjusted to obtain optimal performance as the response time changes with engine speed. Stability is demonstrated for some perturbations that cause initial acceleration or deceleration greater than the limits, yet do not cause collisions.

Suggested Citation

  • Davis, L.C., 2014. "Nonlinear dynamics of autonomous vehicles with limits on acceleration," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 405(C), pages 128-139.
    • Handle: RePEc:eee:phsmap:v:405:y:2014:i:c:p:128-139
    DOI: 10.1016/j.physa.2014.03.014
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    Cited by:

    1. Lykov, A.A. & Malyshev, V.A. & Melikian, M.V., 2017. "Phase diagram for one-way traffic flow with local control," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 486(C), pages 849-866.
    2. Davis, L.C., 2020. "Optimal merging into a high-speed lane dedicated to connected autonomous vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 555(C).
    3. Yao, Zhihong & Xu, Taorang & Jiang, Yangsheng & Hu, Rong, 2021. "Linear stability analysis of heterogeneous traffic flow considering degradations of connected automated vehicles and reaction time," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 561(C).

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