Minimal predicted distance: a common metric for collision avoidance during pairwise interactions between walkers

Gait & Posture
Anne-Hélène OlivierJ Pettré

Abstract

This study investigated collision avoidance between two walkers by focusing on the conditions that lead to avoidance manoeuvres in locomotor trajectories. Following the hypothesis of a reciprocal interaction, we suggested a mutual variable as a continuous function of the two walkers' states, denoted minimum predicted distance (MPD). This function predicts the risk of collision, and its evolution over time captures the motion adaptations performed by the walkers. By groups of two, 30 walkers were assigned locomotion tasks which lead to potential collisions. Results showed that walkers adapted their motions only when required, i.e., when MPD is too low (<1 m). We concluded that walkers are able (i) to accurately estimate their reciprocal distance at the time the crossing will occur, and (ii) to mutually adapt this distance. Furthermore, the study of MPD evolution showed three successive phases in the avoidance interaction: observation where MPD(t) is constant, reaction where MPD(t) increases to acceptable values by adapting locomotion and regulation where MPD(t) reaches a plateau and slightly decreases. This final phase demonstrates that collision avoidance is actually performed with anticipation. Future work would consist in ins...Continue Reading

References

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Citations

Mar 4, 2014·PloS One·Markus HuberJoachim Hermsdörfer
May 15, 2013·Gait & Posture·Anne-Hélène OlivierJulien Pettré
May 3, 2014·Journal of Motor Behavior·Ana DinizPedro Passos
Jul 30, 2016·Gait & Posture·Matt DicksChris Mills
Oct 17, 2016·Gait & Posture·Christian VassalloJulien Pettré
Dec 10, 2016·PloS One·Daniel CartonDirk Wollherr
Mar 16, 2018·IEEE Transactions on Visualization and Computer Graphics·Myungho LeeGreg Welch
Oct 11, 2017·Royal Society Open Science·S RoyA Habbal
Dec 1, 2017·Journal of Neurophysiology·Anuja DarekarJoyce Fung
Sep 5, 2018·Experimental Brain Research·Lana M Pfaff, Michael E Cinelli
Dec 20, 2014·Physical Review Letters·Ioannis KaramouzasStephen J Guy
Dec 18, 2018·Frontiers in Psychology·Laurentius Antonius MeerhoffAnne-Hélène Olivier
Mar 20, 2020·Journal of Motor Behavior·Sheryl M BourgaizeMichael E Cinelli
Nov 12, 2020·Experimental Brain Research·Sean D LynchAnne-Hélène Olivier
Jun 12, 2020·Gait & Posture·Brittany A Baxter, William H Warren
Apr 17, 2021·Frontiers in Virtual Reality·Emily A Keshner, Anouk Lamontagne
Jun 7, 2021·Experimental Brain Research·Hayati B JoshiAnouk Lamontagne
Jun 13, 2021·Gait & Posture·Victoria RaposAnne-Hélène Olivier
Jul 29, 2021·Scientific Reports·Mohammad R Saeedpour-PariziJohn B Shea
Oct 1, 2019··Himangshu SaikiaChristopher Peters

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