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Predator Effects on the Stability of Collective Motions of Self-Propelled Particles

Goddoosi Dehnavi, Parviz | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48191 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Jalali, Mir Abbas
  7. Abstract:
  8. The design and control of collective robots for different purposes has been one of the most interesting subjects in recent years. Interacting particles (both in engineering and nature) can not only be self-organized, but also show a myriad of amazing features. A lot of different types of collective motion can be seen in nature (like fishes, birds, bacteria, insects, to name but a few) which interacting with each other to form complicated patterns with ingenious purpose like foraging, predator escaping and so forth. Understanding these natural phenomena (like vortex formation) can be helpful in designing artificial systems, the usage of which are underwater or space vehicles performing a cooperative tasks, such as surveillance or monitoring of an area, cleaning mines and etc. an important issue in regard of studying the stability of these systems by considering external factors like predators. In the present study, the responses of self-propelled particles to a predator are investigated. On this matter, we study different responses of the self-propelled particles to the predator (like phase transitions and evasion) by driving the relations of center of mass velocity and velocity dispersions of a dynamical particle-based model. We numerically solve this model and verify our formulations with numerical results. Our simulations show that a predator can make particles change their phase from vortex to translational motion.
  9. Keywords:
  10. Cooperative Movement ; Phase Transition ; Self-Propelled Particles ; Predator

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