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Elliptical Pedestrian Model Based On Social Force Model

Posted on:2017-04-22Degree:MasterType:Thesis
Country:ChinaCandidate:W PengFull Text:PDF
GTID:2296330485968286Subject:Optical engineering
Abstract/Summary:PDF Full Text Request
With the acceleration of urbanization, more and more people crowded into cities from the countryside. Followed by many attendant traffic problems, for instance, the increase of motor vehicles, road continuous expansion and increasing traffic congestion, and so on. On December 31., 2014, Shanghai,36 people, including a ten-year-old girl, were killed in the panic-stricken stampede, which stressed the importance of public safety. By using pedestrian model in crowd simulation, we can predict the danger in the crowd.The most popular pedestrian model is Social Force Model. The paper introduces Generalized centrifugal-force model and Velocity Obstacle to Social Force Model to solve problems in the Social Force Model.1) In the Social Force Model, pedestrian is represented with circles, and in this paper, we use ellipses. Thanks to the circles representation, pedestrian in Social Force Model is isotropy. But a typical pedestrian of approximately shoulder-with and body depth is 0.228m and 0.149m. Our proposed elliptical representation captures the pedestrian shape accurately and can keep track of the orientation. Meanwhile, we design a rule that the pedestrian can turn shoulder. As a result, our modified model can simulate two people in a narrow corridor with a width of 0.6m, and it performs well.2)We added Velocity Obstacle to the model to predict if two pedestrian will collide. If not, the social force between them will be ignored. Thus, the movement of pedestrian become more smoothly. 3)We apply the model in corridor crowd flow. We obtain the relation of velocity-density. So, if we want increase the flux of the people, it’s better to control the crowd density to 2 people per meter square.
Keywords/Search Tags:pedestrian model, social force model, Velocity Obstacle, Generalized centrifugal-force model
PDF Full Text Request
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